Revert of Clean up WindowEventDispatcher some more.

ash/first_run/desktop_cleaner.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/first_run/desktop_cleaner.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_observer.h"
-#include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification_blocker.h"
 
 namespace ash {
 namespace internal {
 
 namespace {
 
 const int kContainerIdsToHide[] = {
@@ skipping 88 matching lines @@
 
 // static
 std::vector<int> DesktopCleaner::GetContainersToHideForTest() {
   return std::vector<int>(kContainerIdsToHide,
                           kContainerIdsToHide + arraysize(kContainerIdsToHide));
 }
 
 }  // namespace internal
 }  // namespace ash