chrome: Cleanup class/struct forward declarations

chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.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_ASH_LAUNCHER_APP_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_APP_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "chrome/browser/ui/ash/launcher/launcher_item_controller.h"
 #include "url/gurl.h"
 
 class Browser;
 class URLPattern;
 
+namespace content {
+class WebContents;
+}
+
 namespace extensions {
 class Extension;
 }
 
 class ChromeLauncherController;
 
 // Item controller for an app shortcut. Shortcuts track app and launcher ids,
 // but do not have any associated windows (opening a shortcut will replace the
 // item with the appropriate LauncherItemController type).
 class AppShortcutLauncherItemController : public LauncherItemController {
@@ skipping 69 matching lines @@
   // Since V2 applications can be undetectable after launching, this timer is
   // keeping track of the last launch attempt.
   base::Time last_launch_attempt_;
 
   ChromeLauncherController* chrome_launcher_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(AppShortcutLauncherItemController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_APP_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_