Fix the content_browsertests everywhere maybe.

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/ash_switches.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/focus_cycler.h"
 #include "ash/shelf_types.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_factory.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/base_layout_manager.h"
 #include "ash/wm/boot_splash_screen.h"
 #include "ash/wm/panel_layout_manager.h"
 #include "ash/wm/panel_window_event_filter.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "ash/wm/screen_dimmer.h"
 #include "ash/wm/shelf_layout_manager.h"
+#include "ash/wm/stacking_controller.h"
 #include "ash/wm/status_area_layout_manager.h"
 #include "ash/wm/system_background_controller.h"
 #include "ash/wm/system_modal_container_layout_manager.h"
 #include "ash/wm/toplevel_window_event_handler.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/workspace_controller.h"
 #include "base/command_line.h"
 #include "base/time.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 122 matching lines @@
 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) {
   SetRootWindowController(root_window, this);
   screen_dimmer_.reset(new ScreenDimmer(root_window));
+
+  stacking_controller_.reset(new ash::StackingController);
+  aura::client::SetStackingClient(root_window, stacking_controller_.get());
 }
 
 RootWindowController::~RootWindowController() {
   Shutdown();
   root_window_.reset();
 }
 
 // static
 RootWindowController* RootWindowController::ForLauncher(aura::Window* window) {
   if (Shell::IsLauncherPerDisplayEnabled())
@@ skipping 495 matching lines @@
       "OverlayContainer",
       lock_screen_related_containers);
   SetUsesScreenCoordinates(overlay_container);
 
   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
                   "PowerButtonAnimationContainer", root_window) ;
 }
 
 }  // namespace internal
 }  // namespace ash