Clean up forward declarations and include files in Source/bindings

Source/bindings/core/v8/CustomElementConstructorBuilder.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CustomElementConstructorBuilder_h
 #define CustomElementConstructorBuilder_h
 
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/V8CustomElementLifecycleCallbacks.h"
 #include "core/dom/QualifiedName.h"
 #include "core/dom/custom/CustomElementLifecycleCallbacks.h"
-#include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/AtomicString.h"
 #include <v8.h>
 
 namespace blink {
 
 class CustomElementDefinition;
 class Document;
-class Element;
 class ElementRegistrationOptions;
 class ExceptionState;
 class QualifiedName;
-class V8PerContextData;
 struct WrapperTypeInfo;
 
 // Handles the scripting-specific parts of the Custom Elements element
 // registration algorithm and constructor generation algorithm. It is
 // used in the implementation of those algorithms in
 // Document::registerElement.
 class CustomElementConstructorBuilder {
     WTF_MAKE_NONCOPYABLE(CustomElementConstructorBuilder);
 public:
     CustomElementConstructorBuilder(ScriptState*, const ElementRegistrationOptions&);
@@ skipping 21 matching lines @@
     RefPtr<ScriptState> m_scriptState;
     const ElementRegistrationOptions& m_options;
     v8::Handle<v8::Object> m_prototype;
     v8::Handle<v8::Function> m_constructor;
     RefPtr<V8CustomElementLifecycleCallbacks> m_callbacks;
 };
 
 } // namespace blink
 
 #endif // CustomElementConstructorBuilder_h