chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/options/network_config_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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_OPTIONS_NETWORK_CONFIG_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_OPTIONS_NETWORK_CONFIG_VIEW_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "ui/gfx/native_widget_types.h"  // gfx::NativeWindow
 #include "ui/views/controls/button/button.h"  // views::ButtonListener
 #include "ui/views/window/dialog_delegate.h"
 
-namespace gfx {
-class ImageSkia;
-}
-
 namespace views {
 class ImageView;
 }
 
 namespace chromeos {
 
 class ChildNetworkConfigView;
 class NetworkPropertyUIData;
 class NetworkState;
 
@@ skipping 145 matching lines @@
  private:
   bool managed_;
   views::ImageView* image_view_;
 
   DISALLOW_COPY_AND_ASSIGN(ControlledSettingIndicatorView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_NETWORK_CONFIG_VIEW_H_