Clean up forward declarations in Source/core/html

Source/core/html/forms/SearchInputType.h

 /*
  * Copyright (C) 2010 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 18 matching lines @@
  */
 
 #ifndef SearchInputType_h
 #define SearchInputType_h
 
 #include "core/html/forms/BaseTextInputType.h"
 #include "platform/Timer.h"
 
 namespace blink {
 
-class SearchFieldCancelButtonElement;
-class SearchFieldDecorationElement;
-
 class SearchInputType FINAL : public BaseTextInputType {
 public:
     static PassRefPtrWillBeRawPtr<InputType> create(HTMLInputElement&);
 
     void stopSearchEventTimer();
 
 private:
     SearchInputType(HTMLInputElement&);
     virtual void countUsage() OVERRIDE;
     virtual RenderObject* createRenderer(RenderStyle*) const OVERRIDE;
@@ skipping 10 matching lines @@
     bool searchEventsShouldBeDispatched() const;
     void startSearchEventTimer();
     void updateCancelButtonVisibility();
 
     Timer<SearchInputType> m_searchEventTimer;
 };
 
 } // namespace blink
 
 #endif // SearchInputType_h