Rename RootWindowHost* to WindowTreeHost*

ash/shell_delegate.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_SHELL_DELEGATE_H_
 #define ASH_SHELL_DELEGATE_H_
 
 #include <string>
 
 #include "ash/ash_export.h"
@@ skipping 28 matching lines @@
 namespace keyboard {
 class KeyboardControllerProxy;
 }
 
 namespace ash {
 
 class AccessibilityDelegate;
 class CapsLockDelegate;
 class MediaDelegate;
 class NewWindowDelegate;
-class RootWindowHostFactory;
+class WindowTreeHostFactory;
 class SessionStateDelegate;
 class ShelfDelegate;
 class ShelfModel;
 class SystemTrayDelegate;
 class UserWallpaperDelegate;
 struct LauncherItem;
 
 // Delegate of the Shell.
 class ASH_EXPORT ShellDelegate {
  public:
@@ skipping 63 matching lines @@
   virtual MediaDelegate* CreateMediaDelegate() = 0;
 
   // Creates a user action client. Shell takes ownership of the object.
   virtual aura::client::UserActionClient* CreateUserActionClient() = 0;
 
   // Creates a menu model of the context for the |root_window|.
   virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) = 0;
 
   // Creates a root window host factory. Shell takes ownership of the returned
   // value.
-  virtual RootWindowHostFactory* CreateRootWindowHostFactory() = 0;
+  virtual WindowTreeHostFactory* CreateWindowTreeHostFactory() = 0;
 
   // Get the product name.
   virtual base::string16 GetProductName() const = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_DELEGATE_H_