Move root_window.* to window_event_dispatcher.*

ash/wm/screen_dimmer.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 "ash/shell.h"
 #include "base/time/time.h"
-#include "ui/aura/root_window.h"
+#include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace ash {
 namespace internal {
 
 namespace {
 
@@ skipping 40 matching lines @@
 
 void ScreenDimmer::OnWindowBoundsChanged(aura::Window* root,
                                          const gfx::Rect& old_bounds,
                                          const gfx::Rect& new_bounds) {
   if (dimming_layer_)
     dimming_layer_->SetBounds(gfx::Rect(root->bounds().size()));
 }
 
 }  // namespace internal
 }  // namespace ash