Cleanup: Remove ViewProp from aura build

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 <vector>
@@ skipping 13 matching lines @@
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
 
 namespace ui {
 class Animation;
 class Compositor;
 class Layer;
 class LayerAnimationSequence;
 class Transform;
-class ViewProp;
 }
 
 namespace aura {
 
 class Desktop;
 class EventFilter;
 class KeyEvent;
 class LayoutManager;
 class MouseEvent;
 class ToplevelWindowContainer;
@@ skipping 308 matching lines @@
   // provided this window has children. See set_stops_event_propagation().
   bool stops_event_propagation_;
 
   ObserverList<WindowObserver> observers_;
 
   // We're using ViewProp to store the property (for now) instead of
   // just using std::map because chrome is still using |ViewProp| class
   // to create and access property.
   // TODO(oshima): Consolidcate ViewProp and aura::window property
   // implementation.
-  std::map<const char*, ui::ViewProp*> prop_map_;
+  std::map<const char*, void*> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_