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

chrome/browser/ui/ash/launcher/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_LAUNCHER_ITEM_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_ITEM_CONTROLLER_H_
 
 #include "ash/launcher/launcher_types.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 58 matching lines @@
   virtual void Close() = 0;
 
   // Indicates that the item at |index| has changed from its previous value.
   virtual void LauncherItemChanged(int model_index,
                                    const ash::LauncherItem& old_item) = 0;
 
   // Called when the item is clicked. The behavior varies by the number of
   // windows associated with the item:
   // * One window: toggles the minimize state.
   // * Multiple windows: cycles the active window.
-  virtual void Clicked() = 0;
+  // The |event| is dispatched by a view, therefore the type of the
+  // event's target is |views::View|.
+  virtual void Clicked(const ui::Event& event) = 0;
 
   // Called when the controlled item is removed from the launcher.
   virtual void OnRemoved() = 0;
 
   // Called to retrieve the list of running applications.
   virtual ChromeLauncherAppMenuItems* GetApplicationList() = 0;
 
   // Helper function to get the ash::LauncherItemType for the item type.
   ash::LauncherItemType GetLauncherItemType() const;
 
  protected:
   // Helper function to return the title associated with |app_id_|.
   // Returns an empty title if no matching extension can be found.
   string16 GetAppTitle() const;
 
  private:
   const Type type_;
   // App id will be empty if there is no app associated with the window.
   const std::string app_id_;
   ash::LauncherID launcher_id_;
   ChromeLauncherController* launcher_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherItemController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_ITEM_CONTROLLER_H_