Use Ash's ShelfWindowWatcher for app panel windows.

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.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_IMPL_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_IMPL_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 149 matching lines @@
   void OnAppUninstalledPrepared(content::BrowserContext* browser_context,
                                 const std::string& app_id) override;
 
  protected:
   // Creates a new app shortcut item and controller on the shelf at |index|.
   // Use kInsertItemAtEnd to add a shortcut as the last item.
   ash::ShelfID CreateAppShortcutLauncherItem(
       const ash::launcher::AppLauncherId& app_launcher_id,
       int index);
 
-  const std::string& GetAppIdFromShelfIdForTest(ash::ShelfID id);
-
  private:
   friend class ChromeLauncherControllerImplTest;
   friend class ShelfAppBrowserTest;
   friend class LauncherPlatformAppBrowserTest;
   FRIEND_TEST_ALL_PREFIXES(ChromeLauncherControllerImplTest, AppPanels);
 
   typedef std::map<ash::ShelfID, LauncherItemController*> IDToItemControllerMap;
   typedef std::map<content::WebContents*, std::string> WebContentsToAppIDMap;
 
   // Remembers / restores list of running applications.
@@ skipping 49 matching lines @@
                                      const std::string& app_id,
                                      ash::ShelfItemStatus status,
                                      int index,
                                      ash::ShelfItemType shelf_item_type);
 
   // Enumerate all Web contents which match a given shortcut |controller|.
   std::vector<content::WebContents*> GetV1ApplicationsFromController(
       LauncherItemController* controller);
 
   // Create ShelfItem for Browser Shortcut.
-  ash::ShelfID CreateBrowserShortcutLauncherItem();
+  void CreateBrowserShortcutLauncherItem();
 
   // Check if the given |web_contents| is in incognito mode.
   bool IsIncognito(const content::WebContents* web_contents) const;
 
   // Finds the index of where to insert the next item.
   int FindInsertionPoint();
 
   // Close all windowed V1 applications of a certain extension which was already
   // deleted.
   void CloseWindowedAppsFromRemovedExtension(const std::string& app_id,
@@ skipping 70 matching lines @@
   typedef std::vector<std::string> RunningAppListIds;
   typedef std::map<std::string, RunningAppListIds> RunningAppListIdMap;
   RunningAppListIdMap last_used_running_application_order_;
 
   base::WeakPtrFactory<ChromeLauncherControllerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherControllerImpl);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_IMPL_H_