[mus+ash] Removes WmWindow from RootWindowcontroller implementation

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 <memory>
 #include <vector>
@@ skipping 280 matching lines @@
   // of the supplied arguments.
   // TODO(sky): mash should create AshWindowTreeHost, http://crbug.com/671246.
   RootWindowController(AshWindowTreeHost* ash_host,
                        aura::WindowTreeHost* window_tree_host);
 
   // Initializes the RootWindowController based on |root_window_type|.
   void Init(RootWindowType root_window_type);
 
   void InitLayoutManagers();
 
-  // Creates the containers (WmWindows) used by the shell.
+  // Creates the containers (aura::Windows) used by the shell.
   void CreateContainers();
 
   // Initializes |system_wallpaper_| and possibly also |boot_splash_screen_|.
   // The initial color is determined by the |root_window_type| and whether or
   // not this is the first boot.
   void CreateSystemWallpaper(RootWindowType root_window_type);
 
   // Enables projection touch HUD.
   void EnableTouchHudProjection();
 
@@ skipping 67 matching lines @@
 
 // On classic ash, returns the RootWindowController for the given |root_window|.
 // On mus ash, returns the RootWindowController for the primary display.
 // See RootWindowController class comment above.
 ASH_EXPORT RootWindowController* GetRootWindowController(
     const aura::Window* root_window);
 
 }  // namespace ash
 
 #endif  // ASH_ROOT_WINDOW_CONTROLLER_H_