Revert 177182 - ViewTest.ChangeNativeViewHierarchyFindRoots failure

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 "ash/ash_export.h"
 #include "ash/shelf_types.h"
 #include "ash/system/user/login_status.h"
@@ skipping 14 matching lines @@
 
 namespace views {
 namespace corewm {
 class InputMethodEventFilter;
 class RootWindowEventFilter;
 }
 }
 
 namespace ash {
 class Launcher;
-class StackingController;
 class SystemTray;
 class ToplevelWindowEventHandler;
 
 namespace internal {
 
 class BootSplashScreen;
 class PanelLayoutManager;
 class RootWindowLayoutManager;
 class ScreenDimmer;
 class ShelfLayoutManager;
@@ skipping 124 matching lines @@
   bool IsImmersiveMode() const;
 
  private:
   // Creates each of the special window containers that holds windows of various
   // types in the shell UI.
   void CreateContainersInRootWindow(aura::RootWindow* root_window);
 
   scoped_ptr<aura::RootWindow> root_window_;
   RootWindowLayoutManager* root_window_layout_;
 
-  scoped_ptr<StackingController> stacking_controller_;
-
   // Widget containing system tray.
   StatusAreaWidget* status_area_widget_;
 
   // The shelf for managing the launcher and the status widget.
   // RootWindowController does not own the shelf. Instead, it is owned
   // by container of the status area.
   ShelfLayoutManager* shelf_;
 
   // Manages layout of panels. Owned by PanelContainer.
   PanelLayoutManager* panel_layout_manager_;
@@ skipping 12 matching lines @@
   scoped_ptr<ToplevelWindowEventHandler> modal_container_handler_;
   scoped_ptr<ToplevelWindowEventHandler> lock_modal_container_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 }  // namespace internal
 }  // ash
 
 #endif  //  ASH_ROOT_WINDOW_CONTROLLER_H_