Clean up forward declarations and include files in Source/bindings

Source/bindings/core/v8/V8CustomElementLifecycleCallbacks.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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/custom/CustomElementLifecycleCallbacks.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include <v8.h>
 
 namespace blink {
 
 class CustomElementLifecycleCallbacks;
 class Element;
-class ExecutionContext;
 class V8PerContextData;
 
 class V8CustomElementLifecycleCallbacks FINAL : public CustomElementLifecycleCallbacks, ContextLifecycleObserver {
 public:
     static PassRefPtr<V8CustomElementLifecycleCallbacks> create(ScriptState*, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> attached, v8::Handle<v8::Function> detached, v8::Handle<v8::Function> attributeChanged);
 
     virtual ~V8CustomElementLifecycleCallbacks();
 
     bool setBinding(CustomElementDefinition* owner, PassOwnPtr<CustomElementBinding>);
 
@@ skipping 14 matching lines @@
     ScopedPersistent<v8::Object> m_prototype;
     ScopedPersistent<v8::Function> m_created;
     ScopedPersistent<v8::Function> m_attached;
     ScopedPersistent<v8::Function> m_detached;
     ScopedPersistent<v8::Function> m_attributeChanged;
 };
 
 }
 
 #endif // V8CustomElementLifecycleCallbacks_h