components: Cleanup class/struct fwd declarations

components/omnibox/browser/omnibox_edit_model.h

 // Copyright 2012 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 COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_EDIT_MODEL_H_
 #define COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_EDIT_MODEL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 15 matching lines @@
 #include "url/gurl.h"
 
 class AutocompleteResult;
 class OmniboxClient;
 class OmniboxEditController;
 class OmniboxPopupModel;
 class OmniboxView;
 
 namespace gfx {
 class Image;
-class Rect;
 }
 
 // Reasons why the Omnibox could change into keyword mode.
 // These numeric values are used in UMA logs; do not change them.
 enum class KeywordModeEntryMethod {
   TAB = 0,
   SPACE_AT_END = 1,
   SPACE_IN_MIDDLE = 2,
   KEYBOARD_SHORTCUT = 3,
   QUESTION_MARK = 4,
@@ skipping 515 matching lines @@
 
   // The input that was sent to the AutocompleteController. Since no
   // autocomplete query is started after a tab switch, it is possible for this
   // |input_| to differ from the one currently stored in AutocompleteController.
   AutocompleteInput input_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxEditModel);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_EDIT_MODEL_H_