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

ui/views/controls/focusable_border.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_VIEWS_CONTROLS_FOCUSABLE_BORDER_H_
 #define UI_VIEWS_CONTROLS_FOCUSABLE_BORDER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/views/border.h"
@@ skipping 20 matching lines @@
   }
 
   // Sets the color of this border.
   void SetColor(SkColor color);
   // Reverts the color of this border to the system default.
   void UseDefaultColor();
 
   // 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:
   bool has_focus_;
   gfx::Insets insets_;
 
   // The color to paint the border when |use_default_color_| is false.
   SkColor override_color_;
 
   // Whether the system border color should be used. True unless SetColor has
   // been called.
   bool use_default_color_;
 
   DISALLOW_COPY_AND_ASSIGN(FocusableBorder);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_FOCUSABLE_BORDER_H_