ash: Add RootWindowHostFactory class.

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 <vector>
 
 #include "ash/ash_export.h"
@@ skipping 23 matching lines @@
 namespace views {
 class Widget;
 }
 
 namespace ash {
 
 class CapsLockDelegate;
 class LauncherDelegate;
 class LauncherModel;
 struct LauncherItem;
+class RootWindowHostFactory;
 class SystemTrayDelegate;
 class UserWallpaperDelegate;
 
 enum UserMetricsAction {
   UMA_ACCEL_KEYBOARD_BRIGHTNESS_DOWN_F6,
   UMA_ACCEL_KEYBOARD_BRIGHTNESS_UP_F7,
   UMA_ACCEL_MAXIMIZE_RESTORE_F4,
   UMA_ACCEL_NEWTAB_T,
   UMA_ACCEL_NEXTWINDOW_F5,
   UMA_ACCEL_NEXTWINDOW_TAB,
@@ skipping 151 matching lines @@
 
   // Creates a menu model of the context for the |root_window|.
   virtual ui::MenuModel* CreateContextMenu(aura::RootWindow* root_window) = 0;
 
   // Creates the stacking client. Shell takes ownership of the object.
   virtual aura::client::StackingClient* CreateStackingClient() = 0;
 
   // True if the user's preferences have the Search key acting as a Function key
   // modifier for accessing extended keyboard shortcuts.
   virtual bool IsSearchKeyActingAsFunctionKey() const = 0;
+
+  // Creates a root window host factory. Shell takes ownership of the returned
+  // value.
+  virtual RootWindowHostFactory* CreateRootWindowHostFactory() = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_DELEGATE_H_