Adds WmWindow and converts WindowState to use it

ash/accelerators/accelerator_commands_unittest.cc

 // Copyright 2013 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/accelerators/accelerator_commands.h"
 
 #include <memory>
 
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state.h"
+#include "ash/wm/window_state_aura.h"
 #include "ui/aura/window.h"
 
 // Note: The unit tests for |ToggleMaximized()| and
 // |ToggleFullscreen()| are in
 // chrome/browser/ui/ash/accelerator_commands_browsertests.cc.
 // because they depends on chrome implementation of
 // |ash::wm::WindowStateDelegate|.
 
 namespace ash {
 namespace accelerators {
@@ skipping 23 matching lines @@
   // Toggling minimize when there are no active windows should unminimize and
   // activate the last active window.
   ToggleMinimized();
   EXPECT_FALSE(window_state1->IsMinimized());
   EXPECT_TRUE(window_state1->IsNormalStateType());
   EXPECT_TRUE(window_state1->IsActive());
 }
 
 }  // namespace accelerators
 }  // namespace ash