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

ash/wm/screen_dimmer_unittest.cc

 // 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.
 
 #include "ash/wm/screen_dimmer.h"
 
 #include <memory>
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/window_user_data.h"
 #include "ash/wm/window_dimmer.h"
-#include "ash/wm_window.h"
 #include "base/memory/ptr_util.h"
 #include "ui/aura/test/test_windows.h"
 #include "ui/compositor/layer.h"
 
 namespace ash {
 namespace test {
 
 class ScreenDimmerTest : public AshTestBase {
  public:
   ScreenDimmerTest() {}
@@ skipping 104 matching lines @@
 };
 
 // This test verifies ScreenDimmer can be destroyed after the shell. The
 // interesting part of this test is in TearDown(), which creates a ScreenDimmer
 // that is deleted after Shell.
 TEST_F(ScreenDimmerShellDestructionTest, DontCrashIfScreenDimmerOutlivesShell) {
 }
 
 }  // namespace test
 }  // namespace ash