Remove the Views bubble double widget hack.

ui/views/bubble/bubble_border.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 UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/views/background.h"
@@ skipping 117 matching lines @@
   void set_alignment(BubbleAlignment alignment) { alignment_ = alignment; }
   BubbleAlignment alignment() const { return alignment_; }
 
   // Get the shadow type.
   Shadow shadow() const { return shadow_; }
 
   // Get or set the background color for the bubble and arrow body.
   void set_background_color(SkColor color) { background_color_ = color; }
   SkColor background_color() const { return background_color_; }
 
-  // Get or set the client_bounds, a Windows-only temporary hack.
-  void set_client_bounds(const gfx::Rect& bounds) { client_bounds_ = bounds; }
-  const gfx::Rect& client_bounds() const { return client_bounds_; }
-
   // Sets a desired pixel distance between the arrow tip and the outside edge of
   // the neighboring border image. For example:    |----offset----|
   // '(' represents shadow around the '{' edge:    ((({           ^   })))
   // The arrow will still anchor to the same location but the bubble will shift
   // location to place the arrow |offset| pixels from the perpendicular edge.
   void set_arrow_offset(int offset) { arrow_offset_ = offset; }
 
   // Sets the way the arrow is actually painted.  Default is PAINT_NORMAL.
   void set_paint_arrow(ArrowPaintType value) { arrow_paint_type_ = value; }
 
@@ skipping 21 matching lines @@
   void DrawArrow(gfx::Canvas* canvas, const gfx::Rect& arrow_bounds) const;
 
   Arrow arrow_;
   int arrow_offset_;
   ArrowPaintType arrow_paint_type_;
   BubbleAlignment alignment_;
   Shadow shadow_;
   internal::BorderImages* images_;
   SkColor background_color_;
 
-  // The client/content bounds; must be clipped from the background on Windows.
-  // TODO(msw): Clean this up when Windows native controls are no longer needed.
-  gfx::Rect client_bounds_;
-
   DISALLOW_COPY_AND_ASSIGN(BubbleBorder);
 };
 
 // A Background that clips itself to the specified BubbleBorder and uses
 // the background color of the BubbleBorder.
 class VIEWS_EXPORT BubbleBackground : public Background {
  public:
   explicit BubbleBackground(BubbleBorder* border) : border_(border) {}
 
   // Overridden from Background:
   virtual void Paint(gfx::Canvas* canvas, View* view) const OVERRIDE;
 
  private:
   BubbleBorder* border_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleBackground);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_