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

ash/shell/launcher_delegate_impl.cc

 // 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.
 
 #include "ash/shell/launcher_delegate_impl.h"
 
+#include "ash/launcher/launcher_util.h"
 #include "ash/shell/toplevel_window.h"
 #include "ash/shell/window_watcher.h"
 #include "ash/wm/window_util.h"
 #include "grit/ash_resources.h"
 #include "ui/aura/window.h"
 
 namespace ash {
 namespace shell {
 
 LauncherDelegateImpl::LauncherDelegateImpl(WindowWatcher* watcher)
     : watcher_(watcher) {
 }
 
 LauncherDelegateImpl::~LauncherDelegateImpl() {
 }
 
 // In the shell we'll create a window all the time.
 void LauncherDelegateImpl::OnBrowserShortcutClicked(int event_flags) {
   ash::shell::ToplevelWindow::CreateParams create_params;
   create_params.can_resize = true;
   create_params.can_maximize = true;
   ash::shell::ToplevelWindow::CreateToplevelWindow(create_params);
 }
 
 void LauncherDelegateImpl::ItemClicked(const ash::LauncherItem& item,
-                                       int event_flags) {
+                                       const ui::Event& event) {
   aura::Window* window = watcher_->GetWindowByID(item.id);
+  ash::launcher::MoveToEventRootIfPanel(window, event);
   window->Show();
   ash::wm::ActivateWindow(window);
 }
 
 int LauncherDelegateImpl::GetBrowserShortcutResourceId() {
   return IDR_AURA_LAUNCHER_BROWSER_SHORTCUT;
 }
 
 string16 LauncherDelegateImpl::GetTitle(const ash::LauncherItem& item) {
   return watcher_->GetWindowByID(item.id)->title();
@@ skipping 13 matching lines @@
 ash::LauncherID LauncherDelegateImpl::GetIDByWindow(aura::Window* window) {
   return watcher_ ? watcher_->GetIDByWindow(window) : 0;
 }
 
 bool LauncherDelegateImpl::IsDraggable(const ash::LauncherItem& item) {
   return true;
 }
 
 }  // namespace shell
 }  // namespace ash