Clean up forward declarations in Source/web

Source/web/EditorClientImpl.h

 /*
  * Copyright (C) 2009 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 19 matching lines @@
 
 #ifndef EditorClientImpl_h
 #define EditorClientImpl_h
 
 #include "core/page/EditorClient.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class LocalFrame;
-class HTMLInputElement;
 class WebViewImpl;
 
 class EditorClientImpl final : public EditorClient {
 public:
     explicit EditorClientImpl(WebViewImpl*);
     virtual ~EditorClientImpl();
 
     virtual void respondToChangedContents() override;
     virtual void respondToChangedSelection(LocalFrame*, SelectionType) override;
     virtual bool canCopyCut(LocalFrame*, bool defaultValue) const override;
     virtual bool canPaste(LocalFrame*, bool defaultValue) const override;
     virtual bool handleKeyboardEvent() override;
 
 private:
     WebViewImpl* m_webView;
 };
 
 } // namespace blink
 
 #endif