[WIP] Worklet: Merge MainThreadWorklet and ThreadedWorklet into Worklet

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

Index: third_party/WebKit/Source/modules/compositorworker/AnimationWorklet.h
diff --git a/third_party/WebKit/Source/modules/compositorworker/AnimationWorklet.h b/third_party/WebKit/Source/modules/compositorworker/AnimationWorklet.h
index 7fb42f479ef70c99439a1feccc5cb8352e47a174..cdf7a66b7fc86b9585501f6b84119ccf0c9c9884 100644
--- a/third_party/WebKit/Source/modules/compositorworker/AnimationWorklet.h
+++ b/third_party/WebKit/Source/modules/compositorworker/AnimationWorklet.h
@@ -5,36 +5,30 @@
 #ifndef AnimationWorklet_h
 #define AnimationWorklet_h
 
-#include "core/workers/ThreadedWorklet.h"
+#include "core/workers/Worklet.h"
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class LocalFrame;
-class ThreadedWorkletMessagingProxy;
 class WorkletGlobalScopeProxy;
 
-class MODULES_EXPORT AnimationWorklet final : public ThreadedWorklet {
+class MODULES_EXPORT AnimationWorklet final : public Worklet {
   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_;
+  // Implements Worklet.
+  bool NeedsToCreateGlobalScope();
+  std::unique_ptr<WorkletGlobalScopeProxy> CreateGlobalScope();
 };
 
 }  // namespace blink