Reduce forward declarations in core/dom

Source/core/dom/ExecutionContextClient.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 17 matching lines @@
 #define ExecutionContextClient_h
 
 #include "core/frame/ConsoleTypes.h"
 #include "platform/LifecycleNotifier.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/Forward.h"
 
 namespace WebCore {
 
-class LocalDOMWindow;
-class EventQueue;
 class EventTarget;
 class ExecutionContextTask;
 class KURL;
-template<class T> class LifecycleNotifier;
+class LocalDOMWindow;
 class ScriptCallStack;
 class ScriptState;
 class SecurityContext;
 
 class ExecutionContextClient {
 public:
     virtual void postTask(PassOwnPtr<ExecutionContextTask>) = 0; // Executes the task on context's thread asynchronously.
 
     virtual bool isDocument() const { return false; }
     virtual bool isWorkerGlobalScope() const { return false; }
@@ skipping 16 matching lines @@
 
 protected:
     virtual ~ExecutionContextClient() { }
 
 };
 
 
 } // namespace
 
 #endif