Cleanup: Remove forward declarations in ui, part 2.

ui/aura/window.h

 // Copyright (c) 2011 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.
 
 #ifndef UI_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
 #pragma once
 
 #include <map>
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/string16.h"
 #include "ui/base/events.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window_types.h"
 #include "ui/gfx/compositor/layer.h"
 #include "ui/gfx/compositor/layer_animator.h"
 #include "ui/gfx/compositor/layer_delegate.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
 
 namespace ui {
-class Animation;
-class Compositor;
 class Layer;
-class LayerAnimationSequence;
 class Transform;
 }
 
 namespace aura {
 
 class Desktop;
 class EventFilter;
-class KeyEvent;
 class LayoutManager;
-class MouseEvent;
-class ToplevelWindowContainer;
-class TouchEvent;
 class WindowDelegate;
 class WindowObserver;
 
 namespace internal {
 class FocusManager;
 }
 
 // Aura window implementation. Interesting events are sent to the
 // WindowDelegate.
 // TODO(beng): resolve ownership.
@@ skipping 294 matching lines @@
   // TODO(oshima): Consolidcate ViewProp and aura::window property
   // implementation.
   std::map<const char*, void*> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_