Make views Slider accessible on Chrome OS

ui/views/controls/slider.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_SLIDER_H_
 #define UI_VIEWS_CONTROLS_SLIDER_H_
 #pragma once
 
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/views/view.h"
@@ skipping 30 matching lines @@
     HORIZONTAL,
     VERTICAL
   };
 
   Slider(SliderListener* listener, Orientation orientation);
   virtual ~Slider();
 
   float value() const { return value_; }
   void SetValue(float value);
 
+  void SetAccessibleName(const string16& name);
+
  private:
   void SetValueInternal(float value, SliderChangeReason reason);
 
   // views::View overrides:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE;
   virtual bool OnMouseDragged(const views::MouseEvent& event) OVERRIDE;
+  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
 
   // ui::AnimationDelegate overrides:
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
 
   SliderListener* listener_;
   Orientation orientation_;
 
   scoped_ptr<ui::SlideAnimation> move_animation_;
 
   float value_;
   float animating_value_;
   bool value_is_valid_;
+  string16 accessible_name_;
 
   DISALLOW_COPY_AND_ASSIGN(Slider);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_SLIDER_H_