chrome: Cleanup class/struct forward declarations

chrome/browser/ui/ash/launcher/chrome_launcher_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 CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/public/interfaces/shelf.mojom.h"
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/ui/app_icon_loader.h"
 #include "chrome/browser/ui/app_icon_loader_delegate.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_types.h"
 #include "chrome/browser/ui/ash/launcher/settings_window_observer.h"
 #include "extensions/common/constants.h"
 #include "mojo/public/cpp/bindings/associated_binding.h"
 
 class AccountId;
 class ArcAppDeferredLauncherController;
-class Browser;
 class BrowserShortcutLauncherItemController;
 class GURL;
 class LauncherControllerHelper;
 class LauncherItemController;
 
 namespace ash {
 class WmShelf;
 }
 
 namespace content {
@@ skipping 277 matching lines @@
   // An observer that manages the shelf title and icon for settings windows.
   SettingsWindowObserver settings_window_observer_;
 
   // Used to load the images for app items.
   std::vector<std::unique_ptr<AppIconLoader>> app_icon_loaders_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_