Moved gles pipelines to untracked handles. (flutter/engine#56955)

issue: https://github.com/flutter/flutter/issues/159745

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

engine/src/flutter/ci/licenses_golden/excluded_files

@@ -184,6 +184,7 @@
 ../../../flutter/impeller/playground
 ../../../flutter/impeller/renderer/backend/gles/buffer_bindings_gles_unittests.cc
 ../../../flutter/impeller/renderer/backend/gles/test
+../../../flutter/impeller/renderer/backend/gles/unique_handle_gles_unittests.cc
 ../../../flutter/impeller/renderer/backend/metal/allocator_mtl_unittests.mm
 ../../../flutter/impeller/renderer/backend/metal/texture_mtl_unittests.mm
 ../../../flutter/impeller/renderer/backend/vulkan/allocator_vk_unittests.cc

engine/src/flutter/impeller/renderer/backend/gles/BUILD.gn

@@ -27,6 +27,7 @@ impeller_component("gles_unittests") {
     "test/specialization_constants_unittests.cc",
     "test/surface_gles_unittests.cc",
     "test/texture_gles_unittests.cc",
+    "unique_handle_gles_unittests.cc",
   ]
   deps = [
     ":gles",

engine/src/flutter/impeller/renderer/backend/gles/pipeline_library_gles.cc

@@ -212,7 +212,8 @@ std::shared_ptr<PipelineGLES> PipelineLibraryGLES::CreatePipeline(
       desc,          //
       has_cached_program
           ? std::move(cached_program)
-          : std::make_shared<UniqueHandleGLES>(reactor, HandleType::kProgram)));
+          : std::make_shared<UniqueHandleGLES>(UniqueHandleGLES::MakeUntracked(
+                reactor, HandleType::kProgram))));
 
   auto program = reactor->GetGLHandle(pipeline->GetProgramHandle());
 

engine/src/flutter/impeller/renderer/backend/gles/unique_handle_gles.cc

@@ -15,6 +15,14 @@ UniqueHandleGLES::UniqueHandleGLES(ReactorGLES::Ref reactor, HandleType type)
   }
 }
 
+// static
+UniqueHandleGLES UniqueHandleGLES::MakeUntracked(ReactorGLES::Ref reactor,
+                                                 HandleType type) {
+  FML_DCHECK(reactor);
+  HandleGLES handle = reactor->CreateUntrackedHandle(type);
+  return UniqueHandleGLES(std::move(reactor), handle);
+}
+
 UniqueHandleGLES::UniqueHandleGLES(ReactorGLES::Ref reactor, HandleGLES handle)
     : reactor_(std::move(reactor)), handle_(handle) {}
 

engine/src/flutter/impeller/renderer/backend/gles/unique_handle_gles.h

@@ -19,6 +19,9 @@ class UniqueHandleGLES {
  public:
   UniqueHandleGLES(ReactorGLES::Ref reactor, HandleType type);
 
+  static UniqueHandleGLES MakeUntracked(ReactorGLES::Ref reactor,
+                                        HandleType type);
+
   UniqueHandleGLES(ReactorGLES::Ref reactor, HandleGLES handle);
 
   ~UniqueHandleGLES();

engine/src/flutter/impeller/renderer/backend/gles/unique_handle_gles_unittests.cc

@@ -0,0 +1,42 @@
+// Copyright 2013 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.
+
+#include "flutter/testing/testing.h"  // IWYU pragma: keep
+#include "gtest/gtest.h"
+#include "impeller/renderer/backend/gles/reactor_gles.h"
+#include "impeller/renderer/backend/gles/test/mock_gles.h"
+#include "impeller/renderer/backend/gles/unique_handle_gles.h"
+
+namespace impeller {
+namespace testing {
+
+namespace {
+class TestWorker : public ReactorGLES::Worker {
+ public:
+  bool CanReactorReactOnCurrentThreadNow(
+      const ReactorGLES& reactor) const override {
+    return true;
+  }
+};
+}  // namespace
+
+TEST(UniqueHandleGLES, MakeUntracked) {
+  auto mock_gles = MockGLES::Init();
+  ProcTableGLES::Resolver resolver = kMockResolverGLES;
+  auto proc_table = std::make_unique<ProcTableGLES>(resolver);
+  auto worker = std::make_shared<TestWorker>();
+  auto reactor = std::make_shared<ReactorGLES>(std::move(proc_table));
+  reactor->AddWorker(worker);
+
+  mock_gles->GetCapturedCalls();
+  UniqueHandleGLES handle =
+      UniqueHandleGLES::MakeUntracked(reactor, HandleType::kTexture);
+  EXPECT_FALSE(handle.Get().IsDead());
+  std::vector<std::string> calls = mock_gles->GetCapturedCalls();
+  EXPECT_TRUE(std::find(calls.begin(), calls.end(), "glGenTextures") !=
+              calls.end());
+}
+
+}  // namespace testing
+}  // namespace impeller