Update drag edge indicator view per request by UX team

ash/display/shared_display_edge_indicator.h

 // 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.
 
 #ifndef ASH_DISPLAY_SHARED_DISPLAY_EDGE_INDICATOR_H_
 #define ASH_DISPLAY_SHARED_DISPLAY_EDGE_INDICATOR_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/gfx/display.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace ui {
 class ThrobAnimation;
 }
 
 namespace views {
+class View;
 class Widget;
 }
 
 namespace ash {
 namespace internal {
 
 // SharedDisplayEdgeIndicator is responsible for showing a window that indicates
 // the edge that a window can be dragged into another display.
 class ASH_EXPORT SharedDisplayEdgeIndicator : public ui::AnimationDelegate {
  public:
   SharedDisplayEdgeIndicator();
   virtual ~SharedDisplayEdgeIndicator();
 
   // Shows/Hides the indicator window. The |src_bounds| is for the window on
   // the source display, and the |dst_bounds| is for the window on the other
   // display.
   void Show(const gfx::Rect& src_bounds, const gfx::Rect& dst_bounds);
   void Hide();
 
   // ui::AnimationDelegate overrides:
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
 
  private:
   // Used to show the displays' shared edge where a window can be moved across.
   // |src_widget_| is for the display where drag starts and |dst_widget_| is
   // for the other display.
-  views::Widget* src_widget_;
-  views::Widget* dst_widget_;
+  views::View* src_indicator_;
+  views::View* dst_indicator_;
 
   // Used to transition the opacity.
   scoped_ptr<ui::ThrobAnimation> animation_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedDisplayEdgeIndicator);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_SHARED_DISPLAY_EDGE_INDICATOR_H_