42132e879b
Reland of https://github.com/flutter/flutter/pull/157032.
Failed tests for initial land:
https://flutter-dashboard.appspot.com/#/build?hashFilter=5ca6350a06fdae8d3e160f9adbece193f34d0302&repo=flutter&branch=master
These two tests run the same `flavors_test`
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_pixel_7pro%20flavors_test/4579/overview
https://ci.chromium.org/ui/p/flutter/builders/prod/Windows_mokey%20flavors_test_win/988/overview
which is now passing
https://ci.chromium.org/ui/p/flutter/builders/try/Linux_pixel_7pro%20flavors_test/37/overview
(fixed by 23c62df1dc)
The other failures seem to be flakes
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_pixel_7pro%20new_gallery_impeller_old_zoom__transition_perf/4902/overview
https://ci.chromium.org/ui/p/flutter/builders/prod/Mac%20tool_integration_tests_2_5/1247/overview
the first is a timeout, the second passed in presubmit on the original PR and also on this PR.
Tracing tests
"Application"
The lib/test.dart and lib/control.dart files in this directory are
used by dev/bots/test.dart's runTracingTests function to check
whether aspects of the tracing logic in the framework get compiled out
in profile and release builds. They're not meant to be run directly.
The strings in these files are used in dev/bots/test.dart.
Tests
The tests in this folder must be run with flutter test --enable-vmservice,
since they test that trace data is written to the timeline by connecting to
the observatory.
These tests will fail if run without this flag.