components: Cleanup class/struct fwd declarations

components/omnibox/browser/omnibox_view.h

 // Copyright (c) 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.
 
 // This file defines the interface class OmniboxView.  Each toolkit will
 // implement the edit view differently, so that code is inherently platform
 // specific.  However, the OmniboxEditModel needs to do some communication with
 // the view.  Since the model is shared between platforms, we need to define an
 // interface that all view implementations will share.
 
@@ skipping 10 matching lines @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/omnibox/browser/autocomplete_match.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/native_widget_types.h"
 
 class GURL;
 class OmniboxClient;
 class OmniboxEditController;
 class OmniboxViewMacTest;
-class ToolbarModel;
 class OmniboxEditModel;
 
 namespace gfx {
 enum class VectorIconId;
 }
 
 class OmniboxView {
  public:
   // Represents the changes between two State objects.  This is used by the
   // model to determine how its internal state should be updated after the view
@@ skipping 225 matching lines @@
   friend class OmniboxViewMacTest;
 
   // |model_| can be NULL in tests.
   std::unique_ptr<OmniboxEditModel> model_;
   OmniboxEditController* controller_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxView);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_VIEW_H_