Add GetMinimumSize() for Borders, and make LabelButton auto-size to at least as

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 144 matching lines @@
 
   // Returns the corner radius of the current image set.
   int GetBorderCornerRadius() const;
 
   // Gets the arrow offset to use.
   int GetArrowOffset(const gfx::Size& border_size) const;
 
   // Overridden from Border:
   virtual void Paint(const View& view, gfx::Canvas* canvas) OVERRIDE;
   virtual gfx::Insets GetInsets() const OVERRIDE;
+  virtual gfx::Size GetMinimumSize() const OVERRIDE;
 
  private:
+  gfx::Size GetSizeForContentsSize(const gfx::Size& contents_size) const;
   gfx::ImageSkia* GetArrowImage() const;
   gfx::Rect GetArrowRect(const gfx::Rect& bounds) const;
   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_;
@@ skipping 13 matching lines @@
 
  private:
   BubbleBorder* border_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleBackground);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_