Remove Unused AsTextButtonBorder RTTI helper.

ui/views/controls/button/text_button.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_CONTROLS_BUTTON_TEXT_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_TEXT_BUTTON_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 17 matching lines @@
   virtual ~TextButtonBorder();
 
   void SetInsets(const gfx::Insets& insets);
 
   // Border:
   virtual void Paint(const View& view, gfx::Canvas* canvas) OVERRIDE;
   virtual gfx::Insets GetInsets() const OVERRIDE;
   virtual gfx::Size GetMinimumSize() const OVERRIDE;
 
  private:
-  // Border:
-  virtual TextButtonBorder* AsTextButtonBorder() OVERRIDE;
-  virtual const TextButtonBorder* AsTextButtonBorder() const OVERRIDE;
-
   gfx::Insets insets_;
 
   DISALLOW_COPY_AND_ASSIGN(TextButtonBorder);
 };
 
 
 // A Border subclass that paints a TextButton's background layer -- basically
 // the button frame in the hot/pushed states.
 //
 // Note that this type of button is not focusable by default and will not be
@@ skipping 334 matching lines @@
   // True if the icon and the text are aligned along both the left and right
   // margins of the button.
   bool full_justification_;
 
   DISALLOW_COPY_AND_ASSIGN(TextButton);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_TEXT_BUTTON_H_