[flutter_tools] Update to latest dwds APIs (#51004)

Update to latest dwds APIs, moving back to dwds driven hot restart and enabling future work on expression evaluation.

.cirrus.yml

@@ -168,6 +168,7 @@ task:
         # 6 CPUs, and needed at least 8G of RAM to not run out of memory.
         CPU: 6
         MEMORY: 8G
+        CHROME_NO_SANDBOX: true
       script:
         - dart --enable-asserts ./dev/bots/test.dart
 

dev/automated_tests/pubspec.yaml

@@ -62,7 +62,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -74,4 +74,4 @@ flutter:
   assets:
   - icon/
 
-# PUBSPEC CHECKSUM: f833
+# PUBSPEC CHECKSUM: fb8f

dev/benchmarks/complex_layout/pubspec.yaml

@@ -81,7 +81,7 @@ dev_dependencies:
   string_scanner: 1.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   xml: 3.5.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -93,4 +93,4 @@ flutter:
     - packages/flutter_gallery_assets/people/square/ali.png
     - packages/flutter_gallery_assets/places/india_chettinad_silk_maker.png
 
-# PUBSPEC CHECKSUM: 2d9e
+# PUBSPEC CHECKSUM: b0fa

dev/benchmarks/macrobenchmarks/pubspec.yaml

@@ -81,7 +81,7 @@ dev_dependencies:
   string_scanner: 1.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   xml: 3.5.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -94,4 +94,4 @@ flutter:
   - packages/flutter_gallery_assets/food/cherry_pie.png
   - assets/999x1000.png
 
-# PUBSPEC CHECKSUM: 2d9e
+# PUBSPEC CHECKSUM: b0fa

dev/benchmarks/microbenchmarks/pubspec.yaml

@@ -69,7 +69,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -79,4 +79,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 208d
+# PUBSPEC CHECKSUM: 8ce9

dev/benchmarks/test_apps/stocks/pubspec.yaml

@@ -78,7 +78,7 @@ dev_dependencies:
   sync_http: 0.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webdriver: 2.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -88,4 +88,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: e4c1
+# PUBSPEC CHECKSUM: f41e

dev/bots/pubspec.yaml

@@ -66,7 +66,7 @@ dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -78,4 +78,4 @@ dev_dependencies:
   mockito: 4.1.1
   test_api: 0.2.15
 
-# PUBSPEC CHECKSUM: 4b59
+# PUBSPEC CHECKSUM: 96b5

dev/bots/test.dart

@@ -278,11 +278,15 @@ Future<void> _runToolTests() async {
       final String suffix = Platform.isWindows && subshard == 'commands'
         ? 'permeable'
         : '';
+      // Only linux has Chrome installed and is running web integration tests.
+      // See `_pubRunTest` for more information.
+      final bool forceSingleCore = Platform.isLinux && subshard == 'integration';
       await _pubRunTest(
         toolsPath,
         testPaths: <String>[path.join(kTest, '$subshard$kDotShard', suffix)],
         tableData: bigqueryApi?.tabledata,
         enableFlutterToolAsserts: true,
+        forceSingleCore: forceSingleCore,
       );
     },
   );
@@ -718,6 +722,7 @@ Future<void> _pubRunTest(String workingDirectory, {
   bool useBuildRunner = false,
   String coverage,
   bq.TabledataResourceApi tableData,
+  bool forceSingleCore = false,
 }) async {
   int cpus;
   final String cpuVariable = Platform.environment['CPU']; // CPU is set in cirrus.yml
@@ -731,6 +736,11 @@ Future<void> _pubRunTest(String workingDirectory, {
   } else {
     cpus = 2; // Don't default to 1, otherwise we won't catch race conditions.
   }
+  // Integration tests that depend on external processes like chrome
+  // can get stuck if there are multiple instances running at once.
+  if (forceSingleCore) {
+    cpus = 1;
+  }
 
   final List<String> args = <String>[
     'run',

dev/devicelab/pubspec.yaml

@@ -72,9 +72,9 @@ dev_dependencies:
   string_scanner: 1.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 2.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: f7b1
+# PUBSPEC CHECKSUM: a40e

dev/integration_tests/android_embedding_v2_smoke_test/pubspec.yaml

@@ -20,7 +20,7 @@ dependencies:
   flutter:
     sdk: flutter
   # This plugin is using Android Embedding 1
-  battery: 0.3.1+8
+  battery: 0.3.1+9
   # TODO(egarciad): Add a plugin that uses Android Embedding 2
 
   # The following adds the Cupertino Icons font to your application.
@@ -99,4 +99,4 @@ flutter:
   # For details regarding fonts from package dependencies,
   # see https://flutter.dev/custom-fonts/#from-packages
 
-# PUBSPEC CHECKSUM: cfe7
+# PUBSPEC CHECKSUM: 7fe8

dev/integration_tests/android_semantics_testing/pubspec.yaml

@@ -60,7 +60,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -71,4 +71,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 29b8
+# PUBSPEC CHECKSUM: 6415

dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/pubspec.yaml

@@ -93,7 +93,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -140,4 +140,4 @@ flutter:
   # For details regarding fonts from package dependencies,
   # see https://flutter.dev/custom-fonts/#from-packages
 
-# PUBSPEC CHECKSUM: 3345
+# PUBSPEC CHECKSUM: 51a1

dev/integration_tests/android_splash_screens/splash_screen_trans_rotate/pubspec.yaml

@@ -93,7 +93,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -140,4 +140,4 @@ flutter:
   # For details regarding fonts from package dependencies,
   # see https://flutter.dev/custom-fonts/#from-packages
 
-# PUBSPEC CHECKSUM: 3345
+# PUBSPEC CHECKSUM: 51a1

dev/integration_tests/android_views/pubspec.yaml

@@ -82,7 +82,7 @@ dev_dependencies:
   string_scanner: 1.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   xml: 3.5.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -91,4 +91,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: dcb9
+# PUBSPEC CHECKSUM: cc16

dev/integration_tests/channels/pubspec.yaml

@@ -64,7 +64,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -75,4 +75,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 29b8
+# PUBSPEC CHECKSUM: 6415

dev/integration_tests/codegen/pubspec.yaml

@@ -70,7 +70,7 @@ dev_dependencies:
   string_scanner: 1.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 2.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -82,4 +82,4 @@ builders:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 29b8
+# PUBSPEC CHECKSUM: 6415

dev/integration_tests/external_ui/pubspec.yaml

@@ -64,7 +64,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -75,4 +75,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 29b8
+# PUBSPEC CHECKSUM: 6415

dev/integration_tests/flavors/pubspec.yaml

@@ -64,7 +64,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -75,4 +75,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 29b8
+# PUBSPEC CHECKSUM: 6415

dev/integration_tests/flutter_driver_screenshot_test/pubspec.yaml

@@ -71,7 +71,7 @@ dev_dependencies:
   string_scanner: 1.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 2.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -81,4 +81,4 @@ flutter:
   assets:
     - assets/
 
-# PUBSPEC CHECKSUM: 8f87
+# PUBSPEC CHECKSUM: 06e3

dev/integration_tests/flutter_gallery/pubspec.yaml

@@ -94,7 +94,7 @@ dev_dependencies:
   sync_http: 0.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -274,4 +274,4 @@ flutter:
       - asset: packages/flutter_gallery_assets/fonts/merriweather/Merriweather-Regular.ttf
       - asset: packages/flutter_gallery_assets/fonts/merriweather/Merriweather-Light.ttf
 
-# PUBSPEC CHECKSUM: eaa8
+# PUBSPEC CHECKSUM: 9605

dev/integration_tests/image_loading/pubspec.yaml

@@ -54,7 +54,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -63,4 +63,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: e232
+# PUBSPEC CHECKSUM: 318e

dev/integration_tests/ios_platform_view_tests/pubspec.yaml

@@ -72,7 +72,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -88,4 +88,4 @@ flutter:
   # the material Icons class.
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 509f
+# PUBSPEC CHECKSUM: d7fb

dev/integration_tests/platform_interaction/pubspec.yaml

@@ -64,7 +64,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -75,4 +75,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 29b8
+# PUBSPEC CHECKSUM: 6415

dev/integration_tests/ui/pubspec.yaml

@@ -65,7 +65,7 @@ dependencies:
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vector_math: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -84,4 +84,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 509f
+# PUBSPEC CHECKSUM: d7fb

dev/integration_tests/web/lib/stack_trace.dart

@@ -32,8 +32,8 @@ const List<StackFrame> expectedDebugStackFrames = <StackFrame>[
   StackFrame(
     number: -1,
     packageScheme: 'package',
-    package: 'web_integration',
+    package: 'packages',
-    packagePath: 'stack_trace.dart',
+    packagePath: 'web_integration/stack_trace.dart',
     line: 121,
     column: 3,
     className: '<unknown>',
@@ -43,8 +43,8 @@ const List<StackFrame> expectedDebugStackFrames = <StackFrame>[
   StackFrame(
     number: -1,
     packageScheme: 'package',
-    package: 'web_integration',
+    package: 'packages',
-    packagePath: 'stack_trace.dart',
+    packagePath: 'web_integration/stack_trace.dart',
     line: 116,
     column: 3,
     className: '<unknown>',
@@ -54,8 +54,8 @@ const List<StackFrame> expectedDebugStackFrames = <StackFrame>[
   StackFrame(
     number: -1,
     packageScheme: 'package',
-    package: 'web_integration',
+    package: 'packages',
-    packagePath: 'stack_trace.dart',
+    packagePath: 'web_integration/stack_trace.dart',
     line: 111,
     column: 3,
     className: '<unknown>',

dev/snippets/pubspec.yaml

@@ -68,7 +68,7 @@ dev_dependencies:
   stream_channel: 2.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
@@ -101,4 +101,4 @@ executables:
   vm_service_client: 0.2.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: cf3c
+# PUBSPEC CHECKSUM: 4698

dev/tools/pubspec.yaml

@@ -63,10 +63,10 @@ dev_dependencies:
   stack_trace: 1.9.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   stream_channel: 2.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 2.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 53fb
+# PUBSPEC CHECKSUM: c858

examples/catalog/pubspec.yaml

@@ -72,7 +72,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -84,4 +84,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 509f
+# PUBSPEC CHECKSUM: d7fb

examples/hello_world/pubspec.yaml

@@ -71,7 +71,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -80,4 +80,4 @@ dev_dependencies:
   xml: 3.5.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 2.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 509f
+# PUBSPEC CHECKSUM: d7fb

examples/platform_channel/pubspec.yaml

@@ -71,7 +71,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -83,4 +83,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 509f
+# PUBSPEC CHECKSUM: d7fb

examples/platform_channel_swift/pubspec.yaml

@@ -71,7 +71,7 @@ dev_dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_api: 0.2.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   test_core: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   vm_service_client: 0.2.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -83,4 +83,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 509f
+# PUBSPEC CHECKSUM: d7fb

packages/_flutter_web_build_script/pubspec.yaml

@@ -85,7 +85,7 @@ dependencies:
   test: 1.14.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   timing: 0.1.1+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  vm_service: 3.0.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   web_socket_channel: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 0.5.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -95,4 +95,4 @@ dartdoc:
   # Exclude this package from the hosted API docs.
   nodoc: true
 
-# PUBSPEC CHECKSUM: a925
+# PUBSPEC CHECKSUM: c381

packages/flutter/lib/src/foundation/stack_frame.dart

@@ -103,9 +103,11 @@ class StackFrame {
   }
 
   static StackFrame _parseWebDebugFrame(String line) {
+    // This RegExp is only partially correct for flutter run/test differences.
+    // https://github.com/flutter/flutter/issues/52685
     final bool hasPackage = line.startsWith('package');
     final RegExp parser = hasPackage
-        ? RegExp(r'^(package:.+) (\d+):(\d+)\s+(.+)$')
+        ? RegExp(r'^(package.+) (\d+):(\d+)\s+(.+)$')
         : RegExp(r'^(.+) (\d+):(\d+)\s+(.+)$');
     final Match match = parser.firstMatch(line);
     assert(match != null, 'Expected $line to match $parser.');

packages/flutter_tools/lib/src/build_runner/devfs_web.dart

@@ -41,12 +41,37 @@ import '../web/chrome.dart';
 /// This is only used in development mode.
 class WebAssetServer implements AssetReader {
   @visibleForTesting
-  WebAssetServer(this._httpServer, this._packages, this.internetAddress);
+  WebAssetServer(
+    this._httpServer,
+    this._packages,
+    this.internetAddress,
+    this._modules,
+    this._digests,
+  );
 
   // Fallback to "application/octet-stream" on null which
   // makes no claims as to the structure of the data.
   static const String _kDefaultMimeType = 'application/octet-stream';
 
+  final Map<String, String> _modules;
+
+  final Map<String, String> _digests;
+
+  void performRestart(List<String> modules) {
+    for (final String module in modules) {
+      // We skip computing the digest by using the hashCode of the underlying buffer.
+      // Whenever a file is updated, the corresponding Uint8List.view it corresponds
+      // to will change.
+      final String moduleName = module.startsWith('/')
+        ? module.substring(1)
+        : module;
+      final String name = moduleName.replaceAll('.lib.js', '');
+      final String path = moduleName.replaceAll('.js', '');
+      _modules[name] = path;
+      _digests[name] = _files[moduleName].hashCode.toString();
+    }
+  }
+
   /// Start the web asset server on a [hostname] and [port].
   ///
   /// If [testMode] is true, do not actually initialize dwds or the shelf static
@@ -70,7 +95,15 @@ class WebAssetServer implements AssetReader {
       // ignore: deprecated_member_use
       final Packages packages = await loadPackagesFile(
         Uri.base.resolve('.packages'), loader: (Uri uri) => globals.fs.file(uri).readAsBytes());
-      final WebAssetServer server = WebAssetServer(httpServer, packages, address);
+      final Map<String, String> digests = <String, String>{};
+      final Map<String, String> modules = <String, String>{};
+      final WebAssetServer server = WebAssetServer(
+        httpServer,
+        packages,
+        address,
+        modules,
+        digests,
+      );
       if (testMode) {
         return server;
       }
@@ -92,7 +125,13 @@ class WebAssetServer implements AssetReader {
         urlEncoder: urlTunneller,
         enableDebugging: true,
         serveDevTools: false,
-        logWriter: (Level logLevel, String message) => globals.printTrace(message)
+        logWriter: (Level logLevel, String message) => globals.printTrace(message),
+        loadStrategy: RequireStrategy(
+          ReloadConfiguration.none,
+          '.lib.js',
+          (String path) async => modules,
+          (String path) async => digests,
+        ),
       );
       shelf.Pipeline pipeline = const shelf.Pipeline();
       if (enableDwds) {
@@ -132,6 +171,7 @@ class WebAssetServer implements AssetReader {
   // handle requests for JavaScript source, dart sources maps, or asset files.
   @visibleForTesting
   Future<shelf.Response> handleRequest(shelf.Request request) async {
+    final String requestPath = request.url.path;
     final Map<String, String> headers = <String, String>{};
     // If the response is `/`, then we are requesting the index file.
     if (request.url.path == '/' || request.url.path.isEmpty) {
@@ -150,11 +190,6 @@ class WebAssetServer implements AssetReader {
     final String ifNoneMatch = request.headers[HttpHeaders.ifNoneMatchHeader];
     headers[HttpHeaders.cacheControlHeader] = 'max-age=0, must-revalidate';
 
-    // NOTE: shelf removes leading `/` for some reason.
-    final String requestPath = request.url.path.startsWith('/')
-      ?  request.url.path
-      : '/${request.url.path}';
-
     // If this is a JavaScript file, it must be in the in-memory cache.
     // Attempt to look up the file by URI.
     if (_files.containsKey(requestPath)) {
@@ -191,13 +226,13 @@ class WebAssetServer implements AssetReader {
     // Try and resolve the path relative to the built asset directory.
     if (!file.existsSync()) {
       final Uri potential = globals.fs.directory(getAssetBuildDirectory())
-        .uri.resolve(requestPath.replaceFirst('/assets/', ''));
+        .uri.resolve(requestPath.replaceFirst('assets/', ''));
       file = globals.fs.file(potential);
     }
 
     if (!file.existsSync()) {
       final String webPath = globals.fs.path.join(
-        globals.fs.currentDirectory.childDirectory('web').path, requestPath.substring(1));
+        globals.fs.currentDirectory.childDirectory('web').path, requestPath);
       file = globals.fs.file(webPath);
     }
 
@@ -272,7 +307,10 @@ class WebAssetServer implements AssetReader {
         codeStart,
         codeEnd - codeStart,
       );
-      _files[filePath] = byteView;
+      final String fileName = filePath.startsWith('/')
+        ? filePath.substring(1)
+        : filePath;
+      _files[fileName] = byteView;
 
       final int sourcemapStart = sourcemapOffsets[0];
       final int sourcemapEnd = sourcemapOffsets[1];
@@ -285,9 +323,10 @@ class WebAssetServer implements AssetReader {
         sourcemapStart,
         sourcemapEnd - sourcemapStart,
       );
-      _sourcemaps['$filePath.map'] = sourcemapView;
+      final String sourcemapName = '$fileName.map';
+      _sourcemaps[sourcemapName] = sourcemapView;
 
-      modules.add(filePath);
+      modules.add(fileName);
     }
     return modules;
   }
@@ -331,11 +370,11 @@ class WebAssetServer implements AssetReader {
   File _resolveDartFile(String path) {
     // Return the actual file objects so that local engine changes are automatically picked up.
     switch (path) {
-      case '/dart_sdk.js':
+      case 'dart_sdk.js':
         return canvasKitRendering
           ? canvasKitDartSdk
           : dartSdk;
-      case '/dart_sdk.js.map':
+      case 'dart_sdk.js.map':
         return canvasKitRendering
           ? canvasKitDartSdkSourcemap
           : dartSdkSourcemap;
@@ -382,7 +421,13 @@ class WebAssetServer implements AssetReader {
   }
 
   @override
-  Future<String> dartSourceContents(String serverPath) {
+  Future<String> dartSourceContents(String serverPath) async {
+    // TODO(jonahwilliams): ensure devtools can correctly hide this file.
+    final bool isEntrypointRequest = serverPath == null || serverPath.isEmpty;
+    if (isEntrypointRequest) {
+      return '/* no sourcemaps available. */';
+    }
+
     final File result = _resolveDartFile(serverPath);
     if (result.existsSync()) {
       return result.readAsString();
@@ -534,28 +579,24 @@ class WebDevFS implements DevFS {
     if (bundleFirstUpload) {
       generator.addFileSystemRoot(outputDirectoryPath);
       final String entrypoint = globals.fs.path.basename(mainPath);
-      webAssetServer.writeFile('/require.js', requireJS.readAsStringSync());
+      webAssetServer.writeFile(entrypoint, globals.fs.file(mainPath).readAsStringSync());
-      webAssetServer.writeFile('/dart_stack_trace_mapper.js', stackTraceMapper.readAsStringSync());
+      webAssetServer.writeFile('manifest.json', '{"info":"manifest not generated in run mode."}');
-      webAssetServer.writeFile('/$entrypoint', globals.fs.file(mainPath).readAsStringSync());
+      webAssetServer.writeFile('flutter_service_worker.js', '// Service worker not loaded in run mode.');
-      webAssetServer.writeFile('/manifest.json', '{"info":"manifest not generated in run mode."}');
+      webAssetServer.writeFile('require.js', requireJS.readAsStringSync());
-      webAssetServer.writeFile('/flutter_service_worker.js', '// Service worker not loaded in run mode.');
+      webAssetServer.writeFile('stack_trace_mapper.js', stackTraceMapper.readAsStringSync());
       webAssetServer.writeFile(
-        '/main.dart.js',
+        'main.dart.js',
         generateBootstrapScript(
-          requireUrl: '/require.js',
+          requireUrl: 'require.js',
-          mapperUrl: '/dart_stack_trace_mapper.js',
+          mapperUrl: 'stack_trace_mapper.js',
-          entrypoint: '/$entrypoint.lib.js',
         ),
       );
       webAssetServer.writeFile(
-        '/main_module.bootstrap.js',
+        'main_module.bootstrap.js',
         generateMainModule(
-          entrypoint: '/$entrypoint.lib.js',
+          entrypoint: entrypoint,
         ),
       );
-      // TODO(jonahwilliams): switch to DWDS provided APIs when they are ready.
-      webAssetServer.writeFile('/basic.digests', '{}');
-
       // TODO(jonahwilliams): refactor the asset code in this and the regular devfs to
       // be shared.
       if (bundle != null) {
@@ -602,7 +643,7 @@ class WebDevFS implements DevFS {
     } on FileSystemException catch (err) {
       throwToolExit('Failed to load recompiled sources:\n$err');
     }
-
+    webAssetServer.performRestart(modules);
     return UpdateFSReport(
       success: true,
       syncedBytes: codeFile.lengthSync(),

packages/flutter_tools/lib/src/build_runner/resident_web_runner.dart

@@ -470,7 +470,6 @@ class _ResidentWebRunner extends ResidentWebRunner {
       progressId: 'hot.restart',
     );
 
-    String reloadModules;
     if (debuggingOptions.buildInfo.isDebug) {
       // Full restart is always false for web, since the extra recompile is wasteful.
       final UpdateFSReport report = await _updateDevFS(fullRestart: false);
@@ -481,9 +480,6 @@ class _ResidentWebRunner extends ResidentWebRunner {
         await device.generator.reject();
         return OperationResult(1, 'Failed to recompile application.');
       }
-      reloadModules = report.invalidatedModules
-        .map((String module) => '"$module"')
-        .join(',');
     } else {
       try {
         await buildWeb(
@@ -498,29 +494,22 @@ class _ResidentWebRunner extends ResidentWebRunner {
       }
     }
 
-    Duration transferMarker;
     try {
       if (!deviceIsDebuggable) {
         globals.printStatus('Recompile complete. Page requires refresh.');
-      } else if (!debuggingOptions.buildInfo.isDebug) {
+      } else if (isRunningDebug) {
+        await _vmService.callMethod('hotRestart');
+      } else {
         // On non-debug builds, a hard refresh is required to ensure the
         // up to date sources are loaded.
         await _wipConnection?.sendCommand('Page.reload', <String, Object>{
           'ignoreCache': !debuggingOptions.buildInfo.isDebug,
         });
-      } else {
-        transferMarker = timer.elapsed;
-        await _wipConnection?.debugger?.sendCommand(
-          'Runtime.evaluate', params: <String, Object>{
-            'expression': 'window.\$hotReloadHook([$reloadModules])',
-            'awaitPromise': true,
-            'returnByValue': true,
-          },
-        );
       }
+    } on Exception catch (err) {
+      return OperationResult(1, err.toString(), fatal: true);
     } on WipError catch (err) {
-      globals.printError(err.toString());
+      return OperationResult(1, err.toString(), fatal: true);
-      return OperationResult(1, err.toString());
     } finally {
       status.stop();
     }
@@ -539,7 +528,6 @@ class _ResidentWebRunner extends ResidentWebRunner {
         fullRestart: true,
         reason: reason,
         overallTimeInMs: timer.elapsed.inMilliseconds,
-        transferTimeInMs: timer.elapsed.inMilliseconds - transferMarker.inMilliseconds
       ).send();
     }
     return OperationResult.ok;
@@ -656,13 +644,19 @@ class _ResidentWebRunner extends ResidentWebRunner {
       // Cleanup old subscriptions. These will throw if there isn't anything
       // listening, which is fine because that is what we want to ensure.
       try {
-        await _vmService.streamCancel('Stdout');
+        await _vmService.streamCancel(vmservice.EventStreams.kStdout);
       } on vmservice.RPCError {
         // It is safe to ignore this error because we expect an error to be
         // thrown if we're not already subscribed.
       }
       try {
-        await _vmService.streamListen('Stdout');
+        await _vmService.streamListen(vmservice.EventStreams.kStdout);
+      } on vmservice.RPCError {
+        // It is safe to ignore this error because we expect an error to be
+        // thrown if we're not already subscribed.
+      }
+      try {
+        await _vmService.streamListen(vmservice.EventStreams.kIsolate);
       } on vmservice.RPCError {
         // It is safe to ignore this error because we expect an error to be
         // thrown if we're not already subscribed.
@@ -677,8 +671,6 @@ class _ResidentWebRunner extends ResidentWebRunner {
         await restart(benchmarkMode: false, pause: pause, fullRestart: false);
         return <String, Object>{'type': 'Success'};
       });
-      // Note: can't register our own hot restart hook. Would be fixed by moving
-      // to DWDS digests.
 
       websocketUri = Uri.parse(_connectionResult.debugConnection.uri);
       // Always run main after connecting because start paused doesn't work yet.

packages/flutter_tools/lib/src/compile.dart

@@ -656,6 +656,10 @@ class DefaultResidentCompiler implements ResidentCompiler {
       sdkRoot,
       '--incremental',
       '--target=$targetModel',
+      // TODO(jonahwilliams): remove once this becomes the default behavior
+      // in the frontend_server.
+      // https://github.com/flutter/flutter/issues/52693
+      '--debugger-module-names',
       '-Ddart.developer.causal_async_stacks=${buildMode == BuildMode.debug}',
       for (final Object dartDefine in dartDefines)
         '-D$dartDefine',

packages/flutter_tools/lib/src/test/runner.dart

@@ -190,7 +190,7 @@ class _FlutterTestRunnerImpl implements FlutterTestRunner {
 
       return exitCode;
     } finally {
-      globals.fs.currentDirectory = saved;
+      globals.fs.currentDirectory = saved.path;
       await platform.close();
     }
   }

packages/flutter_tools/lib/src/web/bootstrap.dart

@@ -4,39 +4,6 @@
 
 import 'package:meta/meta.dart';
 
-// This logic is taken directly from https://github.com/dart-lang/build/blob/master/build_web_compilers/lib/src/dev_compiler_bootstrap.dart#L272
-// It should be fairly stable, but is otherwise required to interact with the client.js script
-// vendored with DWDS.
-const String _currentDirectoryScript = r'''
-var _currentDirectory = (function () {
-  var _url;
-  var lines = new Error().stack.split('\n');
-  function lookupUrl() {
-    if (lines.length > 2) {
-      var match = lines[1].match(/^\s+at (.+):\d+:\d+$/);
-      // Chrome.
-      if (match) return match[1];
-      // Chrome nested eval case.
-      match = lines[1].match(/^\s+at eval [(](.+):\d+:\d+[)]$/);
-      if (match) return match[1];
-      // Edge.
-      match = lines[1].match(/^\s+at.+\((.+):\d+:\d+\)$/);
-      if (match) return match[1];
-      // Firefox.
-      match = lines[0].match(/[<][@](.+):\d+:\d+$/)
-      if (match) return match[1];
-    }
-    // Safari.
-    return lines[0].match(/(.+):\d+:\d+$/)[1];
-  }
-  _url = lookupUrl();
-  var lastSlash = _url.lastIndexOf('/');
-  if (lastSlash == -1) return _url;
-  var currentDirectory = _url.substring(0, lastSlash + 1);
-  return currentDirectory;
-})();
-''';
-
 /// The JavaScript bootstrap script to support in-browser hot restart.
 ///
 /// The [requireUrl] loads our cached RequireJS script file. The [mapperUrl]
@@ -49,7 +16,6 @@ var _currentDirectory = (function () {
 String generateBootstrapScript({
   @required String requireUrl,
   @required String mapperUrl,
-  @required String entrypoint,
 }) {
   return '''
 "use strict";
@@ -69,34 +35,6 @@ requireEl.src = "$requireUrl";
 // This attribute tells require JS what to load as main (defined below).
 requireEl.setAttribute("data-main", "main_module.bootstrap");
 document.head.appendChild(requireEl);
-
-// Invoked by connected chrome debugger for hot reload/restart support.
-window.\$hotReloadHook = function(modules) {
-  return new Promise(function(resolve, reject) {
-    if (modules == null) {
-      reject();
-    }
-    // If no modules change, return immediately.
-    if (modules.length == 0) {
-      resolve();
-    }
-    var reloadCount = 0;
-    for (var i = 0; i < modules.length; i++) {
-      require.undef(modules[i]);
-      require([modules[i]], function(module) {
-        reloadCount += 1;
-        // once we've reloaded every module, trigger the hot reload.
-        if (reloadCount == modules.length) {
-          require(["$entrypoint", "dart_sdk"], function(app, dart_sdk) {
-            // See the doc comment under in generateMainModule.
-            window.\$dartRunMain = app[Object.keys(app)[0]].main;
-            window.\$hotReload(resolve);
-          });
-        }
-      });
-    }
-  });
-}
 ''';
 }
 
@@ -112,127 +50,33 @@ window.\$hotReloadHook = function(modules) {
 /// this object is the module.
 String generateMainModule({@required String entrypoint}) {
   return '''/* ENTRYPOINT_EXTENTION_MARKER */
-// baseUrlScript
-var baseUrl = (function () {
-  // Attempt to detect --precompiled mode for tests, and set the base url
-  // appropriately, otherwise set it to '/'.
-  var pathParts = location.pathname.split("/");
-  if (pathParts[0] == "") {
-    pathParts.shift();
-  }
-  if (pathParts.length > 1 && pathParts[1] == "test") {
-    return "/" + pathParts.slice(0, 2).join("/") + "/";
-  }
-  // Attempt to detect base url using <base href> html tag
-  // base href should start and end with "/"
-  if (typeof document !== 'undefined') {
-    var el = document.getElementsByTagName('base');
-    if (el && el[0] && el[0].getAttribute("href") && el[0].getAttribute
-    ("href").startsWith("/") && el[0].getAttribute("href").endsWith("/")){
-      return el[0].getAttribute("href");
-    }
-  }
-  // return default value
-  return "/";
-}());
-$_currentDirectoryScript
-// dart loader
-if(!window.\$dartLoader) {
-   window.\$dartLoader = {
-     appDigests: _currentDirectory + 'basic.digests',
-     moduleIdToUrl: new Map(),
-     urlToModuleId: new Map(),
-     rootDirectories: new Array(),
-     // Used in package:build_runner/src/server/build_updates_client/hot_reload_client.dart
-     moduleParentsGraph: new Map(),
-     moduleLoadingErrorCallbacks: new Map(),
-     forceLoadModule: function (moduleName, callback, onError) {
-       if (typeof onError != 'undefined') {
-         var errorCallbacks = \$dartLoader.moduleLoadingErrorCallbacks;
-         if (!errorCallbacks.has(moduleName)) {
-           errorCallbacks.set(moduleName, new Set());
-         }
-         errorCallbacks.get(moduleName).add(onError);
-       }
-       requirejs.undef(moduleName);
-       requirejs([moduleName], function() {
-         if (typeof onError != 'undefined') {
-           errorCallbacks.get(moduleName).delete(onError);
-         }
-         if (typeof callback != 'undefined') {
-           callback();
-         }
-       });
-     },
-     getModuleLibraries: null, // set up by _initializeTools
-   };
-}
-let modulePaths = {};
-let customModulePaths = {};
-window.\$dartLoader.rootDirectories.push(window.location.origin + baseUrl);
-for (let moduleName of Object.getOwnPropertyNames(modulePaths)) {
-  let modulePath = modulePaths[moduleName];
-  if (modulePath != moduleName) {
-    customModulePaths[moduleName] = modulePath;
-  }
-  var src = window.location.origin + '/' + modulePath + '.js';
-  if (window.\$dartLoader.moduleIdToUrl.has(moduleName)) {
-    continue;
-  }
-  \$dartLoader.moduleIdToUrl.set(moduleName, src);
-  \$dartLoader.urlToModuleId.set(src, moduleName);
-}
 // Create the main module loaded below.
 define("main_module.bootstrap", ["$entrypoint", "dart_sdk"], function(app, dart_sdk) {
   dart_sdk.dart.setStartAsyncSynchronously(true);
   dart_sdk._debugger.registerDevtoolsFormatter();
-  \$dartLoader.getModuleLibraries = dart_sdk.dart.getModuleLibraries;
-  if (window.\$dartStackTraceUtility && !window.\$dartStackTraceUtility.ready) {
-    window.\$dartStackTraceUtility.ready = true;
-    let dart = dart_sdk.dart;
-    window.\$dartStackTraceUtility.setSourceMapProvider(
-      function(url) {
-        url = url.replace(baseUrl, '/');
-        var module = window.\$dartLoader.urlToModuleId.get(url);
-        if (!module) {
-          if (url.endsWith('dart_sdk.js')) {
-            module = 'dart_sdk';
-          } else {
-            try {
-              module = '/packages' + url.split('packages')[1].split('.')[0] + '.dart';
-            } catch (e) {
-              return null;
-            }
-          }
-        }
-        return dart.getSourceMap(module);
-      });
-  }
-  if (typeof document != 'undefined') {
-    window.postMessage({ type: "DDC_STATE_CHANGE", state: "start" }, "*");
-  }
-  dart_sdk._isolate_helper.startRootIsolate(() => {}, []);
 
   // See the generateMainModule doc comment.
   var child = {};
   child.main = app[Object.keys(app)[0]].main;
-  if (window.\$hotReload == null) {
-    window.\$hotReload = function(cb) {
-      dart_sdk.developer.invokeExtension("ext.flutter.disassemble", "{}").then((_) => {
-        dart_sdk.dart.hotRestart();
-        window.\$dartRunMain();
-        window.requestAnimationFrame(cb);
-      });
-    }
-  }
 
   /* MAIN_EXTENSION_MARKER */
   child.main();
-});
 
-// Require JS configuration.
+window.\$dartLoader = {};
-require.config({
+window.\$dartLoader.rootDirectories = [];
-  waitSeconds: 0,
+window.\$requireLoader.getModuleLibraries = dart_sdk.dart.getModuleLibraries;
+  if (window.\$dartStackTraceUtility && !window.\$dartStackTraceUtility.ready) {
+    window.\$dartStackTraceUtility.ready = true;
+    let dart = dart_sdk.dart;
+    window.\$dartStackTraceUtility.setSourceMapProvider(function(url) {
+      url = url.replace(window.\$dartUriBase + '/', '');
+      if (url == 'dart_sdk.js') {
+        return dart.getSourceMap('dart_sdk');
+      }
+      url = url.replace(".lib.js", "");
+      return dart.getSourceMap(url);
+    });
+  }
 });
 ''';
 }

packages/flutter_tools/pubspec.yaml

@@ -11,7 +11,7 @@ dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
   archive: 2.0.11
   args: 1.5.2
-  dwds: 1.0.1
+  dwds: 2.0.1
   completion: 0.2.2
   coverage: 0.13.9
   crypto: 2.1.3
@@ -45,6 +45,8 @@ dependencies:
   test_api: 0.2.15
   test_core: 0.3.3
 
+  vm_service: 3.0.0+1
+
   _fe_analyzer_shared: 1.0.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   analyzer: 0.39.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   async: 2.4.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -55,8 +57,9 @@ dependencies:
   charcode: 1.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   convert: 2.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.16.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  devtools: 0.1.15 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  devtools: 0.2.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  devtools_server: 0.1.13 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  devtools_server: 0.2.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  devtools_shared: 0.2.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   fixnum: 0.10.11 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.14.0+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -90,7 +93,6 @@ dependencies:
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   uuid: 2.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   watcher: 0.9.7+14 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
 dev_dependencies:
@@ -109,4 +111,4 @@ dartdoc:
   # Exclude this package from the hosted API docs.
   nodoc: true
 
-# PUBSPEC CHECKSUM: 8703
+# PUBSPEC CHECKSUM: 8796

packages/flutter_tools/test/general.shard/ios/fallback_discovery_test.dart

@@ -49,14 +49,15 @@ void main() {
 
   testUsingContext('Selects assumed port if VM service connection is successful', () async {
     when(mockVmService.getVM()).thenAnswer((Invocation invocation) async {
-      return VM()..isolates = <IsolateRef>[
+      return VM.parse(<String, Object>{})..isolates = <IsolateRef>[
-        IsolateRef(),
+        IsolateRef.parse(<String, Object>{}),
       ];
     });
     when(mockVmService.getIsolate(any)).thenAnswer((Invocation invocation) async {
-      return Isolate()
+      return Isolate.parse(<String, Object>{})
-        ..rootLib = (LibraryRef()..uri = 'package:hello/main.dart');
+        ..rootLib = (LibraryRef(name: 'main', uri: 'package:hello/main.dart'));
     });
+
     expect(await fallbackDiscovery.discover(
       assumedDevicePort: 23,
       deivce: null,
@@ -69,18 +70,18 @@ void main() {
 
   testUsingContext('Selects assumed port when another isolate has no root library', () async {
     when(mockVmService.getVM()).thenAnswer((Invocation invocation) async {
-      return VM()..isolates = <IsolateRef>[
+      return VM.parse(<String, Object>{})..isolates = <IsolateRef>[
-        IsolateRef()..id = '1',
+        IsolateRef.parse(<String, Object>{})..id = '1',
-        IsolateRef()..id = '2',
+        IsolateRef.parse(<String, Object>{})..id = '2',
       ];
     });
     when(mockVmService.getIsolate('1')).thenAnswer((Invocation invocation) async {
-      return Isolate()
+      return Isolate.parse(<String, Object>{})
         ..rootLib = null;
     });
     when(mockVmService.getIsolate('2')).thenAnswer((Invocation invocation) async {
-      return Isolate()
+      return Isolate.parse(<String, Object>{})
-        ..rootLib = (LibraryRef()..uri = 'package:hello/main.dart');
+        ..rootLib = (LibraryRef.parse(<String, Object>{})..uri = 'package:hello/main.dart');
     });
     expect(await fallbackDiscovery.discover(
       assumedDevicePort: 23,
@@ -94,12 +95,16 @@ void main() {
 
   testUsingContext('Selects mdns discovery if VM service connecton fails due to Sentinel', () async {
     when(mockVmService.getVM()).thenAnswer((Invocation invocation) async {
-      return VM()..isolates = <IsolateRef>[
+      return VM.parse(<String, Object>{})..isolates = <IsolateRef>[
-        IsolateRef(),
+        IsolateRef(
+          id: 'a',
+          name: 'isolate',
+          number: '1',
+        ),
       ];
     });
     when(mockVmService.getIsolate(any)).thenAnswer((Invocation invocation) async {
-      return Sentinel();
+      return Sentinel(kind: 'Something', valueAsString: 'Something');
     });
 
     when(mockMDnsObservatoryDiscovery.getObservatoryUri(

packages/flutter_tools/test/general.shard/resident_web_runner_test.dart

@@ -115,6 +115,11 @@ void main() {
     when(mockVmService.onDebugEvent).thenAnswer((Invocation _) {
       return const Stream<Event>.empty();
     });
+    when(mockVmService.onIsolateEvent).thenAnswer((Invocation _) {
+      return Stream<Event>.fromIterable(<Event>[
+        Event(kind: EventKind.kIsolateStart, timestamp: 1),
+      ]);
+    });
     when(mockDebugConnection.uri).thenReturn('ws://127.0.0.1/abcd/');
     when(mockFlutterDevice.devFS).thenReturn(mockWebDevFS);
     when(mockWebDevFS.sources).thenReturn(<Uri>[]);
@@ -426,7 +431,7 @@ void main() {
   }));
 
   test('web resident runner can toggle CanvasKit', () => testbed.run(() async {
-    final WebAssetServer webAssetServer = WebAssetServer(null, null, null);
+    final WebAssetServer webAssetServer = WebAssetServer(null, null, null, null, null);
     when(mockWebDevFS.webAssetServer).thenReturn(webAssetServer);
 
     expect(residentWebRunner.supportsCanvasKit, true);

packages/flutter_tools/test/general.shard/web/bootstrap_test.dart

@@ -11,7 +11,6 @@ void main() {
     final String result = generateBootstrapScript(
       requireUrl: 'require.js',
       mapperUrl: 'mapper.js',
-      entrypoint: 'foo/bar/main.js',
     );
     // require js source is interpolated correctly.
     expect(result, contains('requireEl.src = "require.js";'));
@@ -19,9 +18,6 @@ void main() {
     expect(result, contains('mapperEl.src = "mapper.js";'));
     // data-main is set to correct bootstrap module.
     expect(result, contains('requireEl.setAttribute("data-main", "main_module.bootstrap");'));
-    // bootstrap main module has correct imports.
-    expect(result, contains('require(["foo/bar/main.js", "dart_sdk"],'
-      ' function(app, dart_sdk) {'));
   });
 
   test('generateMainModule embeds urls correctly', () {

packages/flutter_tools/test/general.shard/web/devfs_web_test.dart

@@ -51,7 +51,13 @@ void main() {
     linux = FakePlatform(operatingSystem: 'linux', environment: <String, String>{});
     windows = FakePlatform(operatingSystem: 'windows', environment: <String, String>{});
     testbed = Testbed(setup: () {
-      webAssetServer = WebAssetServer(mockHttpServer, packages, InternetAddress.loopbackIPv4);
+      webAssetServer = WebAssetServer(
+        mockHttpServer,
+        packages,
+        InternetAddress.loopbackIPv4,
+        null,
+        null,
+      );
     });
   });
 
@@ -103,7 +109,7 @@ void main() {
   }));
 
   test('serves JavaScript files from in memory cache not from manifest', () => testbed.run(() async {
-    webAssetServer.writeFile('/foo.js', 'main() {}');
+    webAssetServer.writeFile('foo.js', 'main() {}');
 
     final Response response = await webAssetServer
       .handleRequest(Request('GET', Uri.parse('http://foobar/foo.js')));
@@ -118,7 +124,7 @@ void main() {
   }));
 
   test('Returns notModified when the ifNoneMatch header matches the etag', () => testbed.run(() async {
-    webAssetServer.writeFile('/foo.js', 'main() {}');
+    webAssetServer.writeFile('foo.js', 'main() {}');
 
     final Response response = await webAssetServer
       .handleRequest(Request('GET', Uri.parse('http://foobar/foo.js')));
@@ -376,24 +382,28 @@ void main() {
       invalidatedFiles: <Uri>[],
     );
 
-    expect(webDevFS.webAssetServer.getFile('/require.js'), isNotNull);
+    expect(webDevFS.webAssetServer.getFile('require.js'), isNotNull);
-    expect(webDevFS.webAssetServer.getFile('/dart_stack_trace_mapper.js'), isNotNull);
+    expect(webDevFS.webAssetServer.getFile('stack_trace_mapper.js'), isNotNull);
-    expect(webDevFS.webAssetServer.getFile('/main.dart'), isNotNull);
+    expect(webDevFS.webAssetServer.getFile('main.dart'), isNotNull);
-    expect(webDevFS.webAssetServer.getFile('/manifest.json'), isNotNull);
+    expect(webDevFS.webAssetServer.getFile('manifest.json'), isNotNull);
-    expect(webDevFS.webAssetServer.getFile('/flutter_service_worker.js'), isNotNull);
+    expect(webDevFS.webAssetServer.getFile('flutter_service_worker.js'), isNotNull);
-    expect(await webDevFS.webAssetServer.dartSourceContents('/dart_sdk.js'), 'HELLO');
+    expect(await webDevFS.webAssetServer.dartSourceContents('dart_sdk.js'), 'HELLO');
-    expect(await webDevFS.webAssetServer.dartSourceContents('/dart_sdk.js.map'), 'THERE');
+    expect(await webDevFS.webAssetServer.dartSourceContents('dart_sdk.js.map'), 'THERE');
 
     // Update to the SDK.
     webDevFS.webAssetServer.dartSdk.writeAsStringSync('BELLOW');
 
     // New SDK should be visible..
-    expect(await webDevFS.webAssetServer.dartSourceContents('/dart_sdk.js'), 'BELLOW');
+    expect(await webDevFS.webAssetServer.dartSourceContents('dart_sdk.js'), 'BELLOW');
 
     // Toggle CanvasKit
     webDevFS.webAssetServer.canvasKitRendering = true;
-    expect(await webDevFS.webAssetServer.dartSourceContents('/dart_sdk.js'), 'OL');
+    expect(await webDevFS.webAssetServer.dartSourceContents('dart_sdk.js'), 'OL');
-    expect(await webDevFS.webAssetServer.dartSourceContents('/dart_sdk.js.map'), 'CHUM');
+    expect(await webDevFS.webAssetServer.dartSourceContents('dart_sdk.js.map'), 'CHUM');
+
+    // Generated entrypoint.
+    expect(await webDevFS.webAssetServer.dartSourceContents(null),
+      contains('/* no sourcemaps available. */'));
 
     await webDevFS.destroy();
   }));

packages/flutter_tools/test/integration.shard/debugger_stepping_web_test.dart

@@ -0,0 +1,56 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+import 'package:file/file.dart';
+import 'package:flutter_tools/src/base/file_system.dart';
+
+import '../src/common.dart';
+import 'test_data/stepping_project.dart';
+import 'test_driver.dart';
+import 'test_utils.dart';
+
+void main() {
+  Directory tempDirectory;
+  FlutterRunTestDriver flutter;
+
+  setUp(() {
+    tempDirectory = createResolvedTempDirectorySync('debugger_stepping_test.');
+  });
+
+  test('Web debugger can step over statements', () async {
+    final WebSteppingProject _project = WebSteppingProject();
+    await _project.setUpIn(tempDirectory);
+
+    flutter = FlutterRunTestDriver(tempDirectory);
+
+    await flutter.run(withDebugger: true, startPaused: true, chrome: true);
+    await flutter.addBreakpoint(_project.breakpointUri, _project.breakpointLine);
+    await flutter.resume();
+    await flutter.waitForPause(); // Now we should be on the breakpoint.
+
+    expect((await flutter.getSourceLocation()).line, equals(_project.breakpointLine));
+
+    // Issue 5 steps, ensuring that we end up on the annotated lines each time.
+    for (int i = 1; i <= _project.numberOfSteps; i += 1) {
+      await flutter.stepOverOrOverAsyncSuspension();
+      final SourcePosition location = await flutter.getSourceLocation();
+      final int actualLine = location.line;
+
+      // Get the line we're expected to stop at by searching for the comment
+      // within the source code.
+      final int expectedLine = _project.lineForStep(i);
+
+      expect(actualLine, equals(expectedLine),
+        reason: 'After $i steps, debugger should stop at $expectedLine but stopped at $actualLine'
+      );
+    }
+  }, skip: !Platform.isLinux); // only linux shards have Chrome installed.
+
+  tearDown(() async {
+    await flutter.stop();
+    tryToDelete(tempDirectory);
+  });
+}

packages/flutter_tools/test/integration.shard/test_data/project.dart

@@ -10,6 +10,17 @@ import 'package:flutter_tools/src/globals.dart' as globals;
 
 import '../test_utils.dart';
 
+const String _kDefaultHtml  = '''
+<html>
+    <head>
+        <title>Hello, World</title>
+    </head>
+    <body>
+        <script src="main.dart.js"></script>
+    </body>
+</html>
+''';
+
 abstract class Project {
   Directory dir;
 
@@ -24,6 +35,7 @@ abstract class Project {
     if (main != null) {
       writeFile(globals.fs.path.join(dir.path, 'lib', 'main.dart'), main);
     }
+    writeFile(globals.fs.path.join(dir.path, 'web', 'index.html'), _kDefaultHtml);
     await getPackages(dir.path);
   }
 

packages/flutter_tools/test/integration.shard/test_data/stepping_project.dart

@@ -57,3 +57,57 @@ class SteppingProject extends Project {
 
   final int numberOfSteps = 8;
 }
+
+class WebSteppingProject extends Project {
+  @override
+  final String pubspec = '''
+  name: test
+  dependencies:
+    flutter:
+      sdk: flutter
+  ''';
+
+  @override
+  final String main = r'''
+  import 'dart:async';
+
+  import 'package:flutter/material.dart';
+
+  void main() => runApp(new MyApp());
+
+  class MyApp extends StatefulWidget {
+    @override
+    _MyAppState createState() => _MyAppState();
+  }
+
+  class _MyAppState extends State<MyApp> {
+    @override
+    void initState() {
+      doAsyncStuff();
+      super.initState();
+    }
+
+    Future<void> doAsyncStuff() async {
+      print("test"); // BREAKPOINT
+      await new Future.value(true); // STEP 1 // STEP 2
+      await new Future.microtask(() => true);
+      await new Future.delayed(const Duration(milliseconds: 1));  // STEP 3
+      print("done!"); // STEP 4
+    } // STEP 5
+
+    @override
+    Widget build(BuildContext context) {
+      return new MaterialApp(
+        title: 'Flutter Demo',
+        home: new Container(),
+      );
+    }
+  }
+  ''';
+
+  Uri get breakpointUri => mainDart;
+  int get breakpointLine => lineContaining(main, '// BREAKPOINT');
+  int lineForStep(int i) => lineContaining(main, '// STEP $i');
+
+  final int numberOfSteps = 5;
+}

packages/flutter_tools/test/integration.shard/test_driver.dart

@@ -105,7 +105,8 @@ abstract class FlutterTestDriver {
         .followedBy(arguments)
         .toList(),
       workingDirectory: _projectFolder.path,
-      environment: <String, String>{'FLUTTER_TEST': 'true'},
+      // The web environment variable has the same effect as `flutter config --enable-web`.
+      environment: <String, String>{'FLUTTER_TEST': 'true', 'FLUTTER_WEB': 'true'},
     );
 
     // This class doesn't use the result of the future. It's made available
@@ -114,8 +115,8 @@ abstract class FlutterTestDriver {
       _debugPrint('Process exited ($code)');
       _hasExited = true;
     }));
-    transformToLines(_process.stdout).listen((String line) => _stdout.add(line));
+    transformToLines(_process.stdout).listen(_stdout.add);
-    transformToLines(_process.stderr).listen((String line) => _stderr.add(line));
+    transformToLines(_process.stderr).listen(_stderr.add);
 
     // Capture stderr to a buffer so we can show it all if any requests fail.
     _stderr.stream.listen(_errorBuffer.writeln);
@@ -304,7 +305,7 @@ abstract class FlutterTestDriver {
 
   Future<Frame> getTopStackFrame() async {
     final String flutterIsolateId = await _getFlutterIsolateId();
-    final Stack stack = await _vmService.getStack(flutterIsolateId);
+    final Stack stack = await _vmService.getStack(flutterIsolateId) as Stack;
     if (stack.frames.isEmpty) {
       throw Exception('Stack is empty');
     }
@@ -433,15 +434,20 @@ class FlutterRunTestDriver extends FlutterTestDriver {
     bool withDebugger = false,
     bool startPaused = false,
     bool pauseOnExceptions = false,
+    bool chrome = false,
     File pidFile,
   }) async {
     await _setupProcess(
       <String>[
         'run',
-        '--disable-service-auth-codes',
+        if (!chrome)
+          '--disable-service-auth-codes',
         '--machine',
         '-d',
-        'flutter-tester',
+        if (chrome)
+          ...<String>['chrome', '--web-run-headless']
+        else
+          'flutter-tester',
       ],
       withDebugger: withDebugger,
       startPaused: startPaused,