chrome: Cleanup class/struct forward declarations

chrome/browser/ui/app_list/app_list_view_delegate.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_UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 31 matching lines @@
 }
 
 namespace base {
 class FilePath;
 }
 
 namespace content {
 struct SpeechRecognitionSessionPreamble;
 }
 
-namespace gfx {
-class ImageSkia;
-}
-
 #if defined(USE_ASH)
 class AppSyncUIStateWatcher;
 #endif
 
 class AppListViewDelegate : public app_list::AppListViewDelegate,
                             public app_list::StartPageObserver,
                             public HotwordClient,
                             public ProfileAttributesStorage::Observer,
                             public SigninManagerBase::Observer,
                             public SigninManagerFactory::Observer,
@@ skipping 133 matching lines @@
   // Window contents of additional custom launcher pages.
   ScopedVector<apps::CustomLauncherPageContents> custom_page_contents_;
 
   // Registers for NOTIFICATION_APP_TERMINATING to unload custom launcher pages.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListViewDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_