Register a separate default ui::EventTarget for Aura (Ash) to ensure that it does not interfere wit…

ash/root_window_controller.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/root_window_controller.h"
 
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/display/display_controller.h"
@@ skipping 139 matching lines @@
 }  // namespace
 
 namespace internal {
 
 RootWindowController::RootWindowController(aura::RootWindow* root_window)
     : root_window_(root_window),
       root_window_layout_(NULL),
       status_area_widget_(NULL),
       shelf_(NULL),
       panel_layout_manager_(NULL) {
+  root_window->set_parent_event_target(Shell::GetInstance());
   SetRootWindowController(root_window, this);
   screen_dimmer_.reset(new ScreenDimmer(root_window));
 }
 
 RootWindowController::~RootWindowController() {
   Shutdown();
   root_window_.reset();
 }
 
 // static
@@ skipping 446 matching lines @@
       "OverlayContainer",
       lock_screen_related_containers);
   SetUsesScreenCoordinates(overlay_container);
 
   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
                   "PowerButtonAnimationContainer", root_window) ;
 }
 
 }  // namespace internal
 }  // namespace ash