Prevent mouse from getting stuck on second display in login

ash/root_window_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 ASH_ROOT_WINDOW_CONTROLLER_H_
 #define ASH_ROOT_WINDOW_CONTROLLER_H_
 
 #include <map>
 
 #include "ash/ash_export.h"
@@ skipping 222 matching lines @@
   scoped_ptr<aura::RootWindow> root_window_;
   RootWindowLayoutManager* root_window_layout_;
 
   scoped_ptr<StackingController> stacking_controller_;
 
   scoped_ptr<keyboard::KeyboardController> keyboard_controller_;
 
   // The shelf for managing the launcher and the status widget.
   scoped_ptr<ShelfWidget> shelf_;
 
+  // An invisible/empty window used as a event target for
+  // |MouseCursorEventFilter| before a user logs in.
+  // (crbug.com/266987)
+  // Its container is |LockScreenBackgroundContainer| and
+  // this must be deleted before the container is deleted.
+  scoped_ptr<aura::Window> mouse_event_target_;
+
   // Manages layout of docked windows. Owned by DockedContainer.
   DockedWindowLayoutManager* docked_layout_manager_;
 
   // Manages layout of panels. Owned by PanelContainer.
   PanelLayoutManager* panel_layout_manager_;
 
   scoped_ptr<SystemBackgroundController> system_background_;
   scoped_ptr<BootSplashScreen> boot_splash_screen_;
 
   scoped_ptr<ScreenDimmer> screen_dimmer_;
@@ skipping 16 matching lines @@
   scoped_ptr<DesktopBackgroundWidgetController> wallpaper_controller_;
   scoped_ptr<AnimatingDesktopController> animating_wallpaper_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 }  // namespace internal
 }  // ash
 
 #endif  //  ASH_ROOT_WINDOW_CONTROLLER_H_