components: Cleanup class/struct fwd declarations

components/omnibox/browser/omnibox_controller.h

 // Copyright 2013 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_CONTROLLER_H_
 #define COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/omnibox/browser/autocomplete_controller.h"
 #include "components/omnibox/browser/autocomplete_controller_delegate.h"
 #include "components/omnibox/browser/autocomplete_match.h"
 
-class AUtocompleteInput;
 struct AutocompleteMatch;
 class AutocompleteResult;
 class InstantController;
 class OmniboxClient;
 class OmniboxEditModel;
 class OmniboxPopupModel;
 
-namespace gfx {
-class Rect;
-}
-
 // This class controls the various services that can modify the content
 // for the omnibox, including AutocompleteController and InstantController. It
 // is responsible of updating the omnibox content.
 // TODO(beaudoin): Keep on expanding this class so that OmniboxEditModel no
 //     longer needs to hold any reference to AutocompleteController. Also make
 //     this the point of contact between InstantController and OmniboxEditModel.
 //     As the refactor progresses, keep the class comment up to date to
 //     precisely explain what this class is doing.
 class OmniboxController : public AutocompleteControllerDelegate {
  public:
@@ skipping 51 matching lines @@
   // but the ones specifically needed are unclear. We should therefore spend
   // some time to extract these fields and use a tighter structure here.
   AutocompleteMatch current_match_;
 
   base::WeakPtrFactory<OmniboxController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxController);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_CONTROLLER_H_