Add accessible names to the launcher buttons

ash/launcher/app_launcher_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 ASH_LAUNCHER_APP_LAUNCHER_BUTTON_H_
 #define ASH_LAUNCHER_APP_LAUNCHER_BUTTON_H_
 #pragma once
 
 #include "ui/views/controls/button/image_button.h"
 
@@ skipping 13 matching lines @@
   // Sets the image to display for this entry.
   void SetAppImage(const SkBitmap& image);
 
  protected:
   // View overrides:
   virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const views::MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual bool OnMouseDragged(const views::MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const views::MouseEvent& event) OVERRIDE;
+  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
 
  private:
   LauncherButtonHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(AppLauncherButton);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_APP_LAUNCHER_BUTTON_H_