chromeos: removes WmWindow usage from MultiWindowResizeController

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 181 matching lines @@
   SystemTray* GetSystemTray();
 
   // True if the window can receive events on this root window.
   bool CanWindowReceiveEvents(aura::Window* window);
 
   // Returns the window events will be targeted at for the specified location
   // (in screen coordinates).
   //
   // NOTE: the returned window may not contain the location as resize handles
   // may extend outside the bounds of the window.
-  WmWindow* FindEventTarget(const gfx::Point& location_in_screen);
+  aura::Window* FindEventTarget(const gfx::Point& location_in_screen);
 
   // Gets the last location seen in a mouse event in this root window's
   // coordinates. This may return a point outside the root window's bounds.
   gfx::Point GetLastMouseLocationInRoot();
 
   aura::Window* GetContainer(int container_id);
   const aura::Window* GetContainer(int container_id) const;
 
   // TODO(sky): remove these. http://crbug.com/671246.
   WmWindow* GetWmContainer(int container_id) {
@@ skipping 165 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_