blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/dom/CompositorProxyClient.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 CompositorProxyClient_h
 #define CompositorProxyClient_h
 
 #include "core/CoreExport.h"
 #include "core/workers/WorkerClients.h"
 #include "wtf/Noncopyable.h"
 
 #include <v8.h>
 
 namespace blink {
 
 class CompositorProxy;
-class Event;
-class ScriptState;
 class WorkerClients;
 class WorkerGlobalScope;
 
 class CORE_EXPORT CompositorProxyClient : public Supplement<WorkerClients> {
   WTF_MAKE_NONCOPYABLE(CompositorProxyClient);
 
  public:
   CompositorProxyClient() {}
 
   static CompositorProxyClient* from(WorkerClients*);
   static const char* supplementName();
 
   virtual void dispose() = 0;
   virtual void setGlobalScope(WorkerGlobalScope*) = 0;
   virtual void requestAnimationFrame() = 0;
   virtual void registerCompositorProxy(CompositorProxy*) = 0;
   // It is not guaranteed to receive an unregister call for every registered
   // proxy. In fact we only receive one when a proxy is explicitly
   // disconnected otherwise we rely on oilpan collection process to remove the
   // weak reference to the proxy.
   virtual void unregisterCompositorProxy(CompositorProxy*) = 0;
 };
 
 CORE_EXPORT void provideCompositorProxyClientTo(WorkerClients*,
                                                 CompositorProxyClient*);
 
 }  // namespace blink
 
 #endif  // CompositorProxyClient_h