[unified-heap] Remove obsolete tests

- LayoutWorklet and PaintWorklet are supplements to LocalDOMWindow which
  ties the lifetime of JS wrappers to the lifetime of the window
- TransformStreamTest does not crash anymore

Bug: 843903
Change-Id: Iea6d46f32fd22d10aa3581ff0712778d4c9ca6ba
Reviewed-on: https://chromium-review.googlesource.com/c/1296591Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601920}

third_party/blink/renderer/core/layout/custom/layout_worklet_test.cc

@@ -63,46 +63,6 @@ class LayoutWorkletTest : public PageTestBase {
   Persistent<LayoutWorklet> layout_worklet_;
 };
 
-TEST_F(LayoutWorkletTest, GarbageCollectionOfCSSLayoutDefinition) {
-  EvaluateScriptModule(R"JS(
-    registerLayout('foo', class {
-      *intrinsicSizes() { }
-      *layout() { }
-    });
-  )JS");
-
-  LayoutWorkletGlobalScope* global_scope = GetGlobalScope();
-  CSSLayoutDefinition* definition = global_scope->FindDefinition("foo");
-  EXPECT_NE(nullptr, definition);
-
-  v8::Isolate* isolate =
-      global_scope->ScriptController()->GetScriptState()->GetIsolate();
-  DCHECK(isolate);
-
-  // Set our ScopedPersistent to the layout function, and make weak.
-  ScopedPersistent<v8::Function> handle;
-  {
-    v8::HandleScope handle_scope(isolate);
-    handle.Set(isolate, definition->LayoutFunctionForTesting(isolate));
-    handle.SetPhantom();
-  }
-  EXPECT_FALSE(handle.IsEmpty());
-  EXPECT_TRUE(handle.IsWeak());
-
-  // Run a GC, persistent shouldn't have been collected yet.
-  ThreadState::Current()->CollectAllGarbage();
-  V8GCController::CollectAllGarbageForTesting(isolate);
-  EXPECT_FALSE(handle.IsEmpty());
-
-  // Delete the page & associated objects.
-  Terminate();
-
-  // Run a GC, the persistent should have been collected.
-  ThreadState::Current()->CollectAllGarbage();
-  V8GCController::CollectAllGarbageForTesting(isolate);
-  EXPECT_TRUE(handle.IsEmpty());
-}
-
 TEST_F(LayoutWorkletTest, ParseProperties) {
   EvaluateScriptModule(R"JS(
     registerLayout('foo', class {

third_party/blink/renderer/core/streams/transform_stream_test.cc

@@ -469,35 +469,6 @@ TEST_F(TransformStreamTest, SurvivesGarbageCollectionWhenTraced) {
                   .value_or(false));
 }
 
-// Verify that JS TransformStream is collected when it is not reachable from V8.
-#if GTEST_HAS_DEATH_TEST
-#define MAYBE_IsGarbageCollectedWhenNotTraced IsGarbageCollectedWhenNotTraced
-#else
-#define MAYBE_IsGarbageCollectedWhenNotTraced \
-  DISABLED_IsGarbageCollectedWhenNotTraced
-#endif
-TEST_F(TransformStreamTest, MAYBE_IsGarbageCollectedWhenNotTraced) {
-  auto page_holder = DummyPageHolder::Create();
-  Persistent<ScriptState> script_state =
-      ToScriptStateForMainWorld(page_holder->GetDocument().GetFrame());
-  {
-    ScriptState::Scope scope(script_state);
-    Init(new IdentityTransformer(), script_state, ASSERT_NO_EXCEPTION);
-  }
-  Persistent<TransformStream> stream = Stream();
-  ClearHolder();
-  Microtask::PerformCheckpoint(script_state->GetIsolate());
-  // Avoid scanning the stack here as it could accidentaly keep state alive.
-  V8GCController::CollectAllGarbageForTesting(
-      script_state->GetIsolate(),
-      v8::EmbedderHeapTracer::EmbedderStackState::kEmpty);
-  ScriptState::Scope scope(script_state);
-  // This emits a warning that death tests are unsafe with threads, but it works
-  // anyway. The crash message depends on whether DCHECK is enabled or not, so
-  // the regex it is required to match is empty.
-  EXPECT_DEATH(stream->Readable(script_state, ASSERT_NO_EXCEPTION), "");
-}
-
 }  // namespace
 
 }  // namespace blink

third_party/blink/renderer/modules/csspaint/paint_worklet_test.cc

@@ -103,43 +103,6 @@ class PaintWorkletTest : public PageTestBase {
   Persistent<TestPaintWorklet> test_paint_worklet_;
 };
 
-TEST_F(PaintWorkletTest, GarbageCollectionOfCSSPaintDefinition) {
-  PaintWorkletGlobalScope* global_scope = GetProxy()->global_scope();
-  global_scope->ScriptController()->Evaluate(
-      ScriptSourceCode("registerPaint('foo', class { paint() { } });"),
-      kSharableCrossOrigin);
-
-  CSSPaintDefinition* definition = global_scope->FindDefinition("foo");
-  DCHECK(definition);
-
-  v8::Isolate* isolate =
-      global_scope->ScriptController()->GetScriptState()->GetIsolate();
-  DCHECK(isolate);
-
-  // Set our ScopedPersistent to the paint function, and make weak.
-  ScopedPersistent<v8::Function> handle;
-  {
-    v8::HandleScope handle_scope(isolate);
-    handle.Set(isolate, definition->PaintFunctionForTesting(isolate));
-    handle.SetPhantom();
-  }
-  DCHECK(!handle.IsEmpty());
-  DCHECK(handle.IsWeak());
-
-  // Run a GC, persistent shouldn't have been collected yet.
-  ThreadState::Current()->CollectAllGarbage();
-  V8GCController::CollectAllGarbageForTesting(isolate);
-  DCHECK(!handle.IsEmpty());
-
-  // Delete the page & associated objects.
-  Terminate();
-
-  // Run a GC, the persistent should have been collected.
-  ThreadState::Current()->CollectAllGarbage();
-  V8GCController::CollectAllGarbageForTesting(isolate);
-  DCHECK(handle.IsEmpty());
-}
-
 // This is a crash test for crbug.com/803026. At some point, we shipped the
 // CSSPaintAPI without shipping the CSSPaintAPIArguments, the result of it is
 // that the |paint_arguments| in the CSSPaintDefinition::Paint() becomes