Move the panel to the root window where the mouse click occurred.

chrome/browser/ui/ash/launcher/chrome_launcher_controller_per_app.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_CHROME_LAUNCHER_CONTROLLER_PER_APP_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_PER_APP_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 218 matching lines @@
   virtual void SetRefocusURLPatternForTest(ash::LauncherID id,
                                            const GURL& url) OVERRIDE;
 
   // Returns the extension identified by |app_id|.
   virtual const extensions::Extension* GetExtensionForAppID(
       const std::string& app_id) OVERRIDE;
 
   // ash::LauncherDelegate overrides:
   virtual void OnBrowserShortcutClicked(int event_flags) OVERRIDE;
   virtual void ItemClicked(const ash::LauncherItem& item,
-                           int event_flags) OVERRIDE;
+                           const ui::Event& event) OVERRIDE;
   virtual int GetBrowserShortcutResourceId() OVERRIDE;
   virtual string16 GetTitle(const ash::LauncherItem& item) OVERRIDE;
   virtual ui::MenuModel* CreateContextMenu(
       const ash::LauncherItem& item, aura::RootWindow* root) OVERRIDE;
   virtual ui::MenuModel* CreateApplicationMenu(
       const ash::LauncherItem& item) OVERRIDE;
   virtual ash::LauncherID GetIDByWindow(aura::Window* window) OVERRIDE;
   virtual bool IsDraggable(const ash::LauncherItem& item) OVERRIDE;
 
   // ash::LauncherModelObserver overrides:
@@ skipping 151 matching lines @@
   PrefChangeRegistrar pref_change_registrar_;
 
   AppSyncUIState* app_sync_ui_state_;
 
   scoped_ptr<ExtensionEnableFlow> extension_enable_flow_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherControllerPerApp);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_PER_APP_H_