[mus+ash] Removes WmWindow from ash/shelf and ash/shell

ash/wm/window_state_util.cc

 // Copyright 2014 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.
 
 #include "ash/wm/window_state_util.h"
 
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_state_delegate.h"
-#include "ash/wm_window.h"
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
 namespace wm {
 
 void ToggleFullScreen(wm::WindowState* window_state,
                       WindowStateDelegate* delegate) {
   // Window which cannot be maximized should not be full screen'ed.
   // It can, however, be restored if it was full screen'ed.
   bool is_fullscreen = window_state->IsFullscreen();
   if (!is_fullscreen && !window_state->CanMaximize())
     return;
 
   if (delegate && delegate->ToggleFullscreen(window_state))
     return;
   ::wm::SetWindowFullscreen(window_state->window(), !is_fullscreen);
 }
 
 }  // namespace wm
 }  // namespace ash