Use wrapper tracing for worklets.

third_party/WebKit/Source/modules/webaudio/AudioWorkletProcessor.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 AudioWorkletProcessor_h
 #define AudioWorkletProcessor_h
 
 #include "modules/ModulesExport.h"
-#include "platform/bindings/ScopedPersistent.h"
+#include "platform/bindings/ScriptWrappable.h"
+#include "platform/bindings/TraceWrapperV8Reference.h"
 #include "platform/heap/Handle.h"
 #include "platform/wtf/text/WTFString.h"
 #include "v8/include/v8.h"
 
 namespace blink {
 
 class AudioBuffer;
 class AudioWorkletGlobalScope;
 class AudioWorkletProcessorDefinition;
 
 // AudioWorkletProcessor class represents the active instance created from
 // AudioWorkletProcessorDefinition. |AudioWorkletNodeHandler| invokes
 // process() method in this object upon graph rendering.
 //
 // This is constructed and destroyed on a worker thread, and all methods also
 // must be called on the worker thread.
 class MODULES_EXPORT AudioWorkletProcessor
-    : public GarbageCollectedFinalized<AudioWorkletProcessor> {
+    : public GarbageCollectedFinalized<AudioWorkletProcessor>,
+      public TraceWrapperBase {
  public:
   static AudioWorkletProcessor* Create(AudioWorkletGlobalScope*,
                                        const String& name);
   virtual ~AudioWorkletProcessor();
 
   void SetInstance(v8::Isolate*, v8::Local<v8::Object> instance);
 
   v8::Local<v8::Object> InstanceLocal(v8::Isolate*);
 
   // |AudioWorkletHandler| invokes this method to process audio.
   void Process(AudioBuffer* input_buffer, AudioBuffer* output_buffer);
 
   const String& GetName() const { return name_; }
 
   DECLARE_TRACE();
+  DECLARE_TRACE_WRAPPERS();
 
  private:
   AudioWorkletProcessor(AudioWorkletGlobalScope*, const String& name);
 
   Member<AudioWorkletGlobalScope> global_scope_;
   const String name_;
-  ScopedPersistent<v8::Object> instance_;
+  TraceWrapperV8Reference<v8::Object> instance_;
 };
 
 }  // namespace blink
 
 #endif  // AudioWorkletProcessor_h