Worklet: Separate Worklet into MainThreadWorklet and ThreadedWorklet

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

 // Copyright 2016 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 AnimationWorklet_h
 #define AnimationWorklet_h
 
-#include "core/workers/Worklet.h"
+#include "core/workers/ThreadedWorklet.h"
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class LocalFrame;
 class ThreadedWorkletMessagingProxy;
 class WorkletGlobalScopeProxy;
 
-class MODULES_EXPORT AnimationWorklet final : public Worklet {
+class MODULES_EXPORT AnimationWorklet final : public ThreadedWorklet {
   WTF_MAKE_NONCOPYABLE(AnimationWorklet);
 
  public:
   static AnimationWorklet* Create(LocalFrame*);
   ~AnimationWorklet() override;
 
   void Initialize() final;
   bool IsInitialized() const final;
 
   WorkletGlobalScopeProxy* GetWorkletGlobalScopeProxy() const final;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit AnimationWorklet(LocalFrame*);
 
   // The proxy outlives the worklet as it is used to perform thread shutdown,
   // it deletes itself once this has occured.
   ThreadedWorkletMessagingProxy* worklet_messaging_proxy_;
 };
 
 }  // namespace blink
 
 #endif  // AnimationWorklet_h