Use wrapper tracing for worklets.

third_party/WebKit/Source/modules/compositorworker/AnimatorDefinition.h

Index: third_party/WebKit/Source/modules/compositorworker/AnimatorDefinition.h
diff --git a/third_party/WebKit/Source/modules/compositorworker/AnimatorDefinition.h b/third_party/WebKit/Source/modules/compositorworker/AnimatorDefinition.h
index b59cf65da38b71807602bb46b99ea4754f761a22..483f3b447f33ce8180390a2d532845799a4848d2 100644
--- a/third_party/WebKit/Source/modules/compositorworker/AnimatorDefinition.h
+++ b/third_party/WebKit/Source/modules/compositorworker/AnimatorDefinition.h
@@ -5,7 +5,8 @@
 #ifndef AnimatorDefinition_h
 #define AnimatorDefinition_h
 
-#include "platform/bindings/ScopedPersistent.h"
+#include "platform/bindings/ScriptWrappable.h"
+#include "platform/bindings/TraceWrapperV8Reference.h"
 #include "platform/heap/Handle.h"
 #include "v8/include/v8.h"
 
@@ -17,23 +18,23 @@ namespace blink {
 // It can be used to instantiate new animators and also to call the Javascript
 // 'animate' callback on a given instance.
 class AnimatorDefinition final
-    : public GarbageCollectedFinalized<AnimatorDefinition> {
+    : public GarbageCollectedFinalized<AnimatorDefinition>,
+      public TraceWrapperBase {
  public:
   AnimatorDefinition(v8::Isolate*,
                      v8::Local<v8::Function> constructor,
                      v8::Local<v8::Function> animate);
   ~AnimatorDefinition();
   DEFINE_INLINE_TRACE() {}
+  DECLARE_TRACE_WRAPPERS();
 
   v8::Local<v8::Function> ConstructorLocal(v8::Isolate*);
 
  private:
   // This object keeps the constructor function, and animate function alive.
-  // It needs to be destroyed to break a reference cycle between it and the
-  // AnimationWorkletGlobalScope. This cycle is broken in
-  // |AnimationWorkletGlobalScope::Dispose()|.
-  ScopedPersistent<v8::Function> constructor_;
-  ScopedPersistent<v8::Function> animate_;
+  // It participates in wrapper tracing as it holds onto V8 wrappers.
+  TraceWrapperV8Reference<v8::Function> constructor_;
+  TraceWrapperV8Reference<v8::Function> animate_;
 };
 
 }  // namespace blink