Use wrapper tracing for worklets.

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

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #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"
 
 namespace blink {
 
 // This class represents a valid registered Javascript animator. Note that it
 // assumed the argument passed to its constructor have been validated to have
 // proper type.
 // 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
 
 #endif  // AnimatorDefinition_h