chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/location_bar/keyword_hint_view.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_KEYWORD_HINT_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_KEYWORD_HINT_VIEW_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/views/view.h"
 
 class Profile;
 
 namespace gfx {
 class FontList;
 }
 
 namespace views {
-class ImageView;
 class Label;
 }
 
 // KeywordHintView is used by the location bar view to display a hint to the
 // user when the selected url has a corresponding keyword.
 //
 // Internally KeywordHintView uses two labels to render the text, and draws
 // the tab image itself.
 //
 // NOTE: This should really be called LocationBarKeywordHintView, but I
@@ skipping 31 matching lines @@
 
   // Height of the tab key view.
   int tab_key_height_;
 
   base::string16 keyword_;
 
   DISALLOW_COPY_AND_ASSIGN(KeywordHintView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_KEYWORD_HINT_VIEW_H_