arc: Make ChromeVox read an ARC custom notification

ui/message_center/views/message_view.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_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 44 matching lines @@
   // Returns the insets for the shadow it will have for rich notification.
   static gfx::Insets GetShadowInsets();
 
   // Creates a shadow around the notification.
   void CreateShadowBorder();
 
   bool IsCloseButtonFocused();
   void RequestFocusOnCloseButton();
   bool IsPinned();
 
-  void set_accessible_name(const base::string16& accessible_name) {
-    accessible_name_ = accessible_name;
-  }
-
   // Overridden from views::View:
   void GetAccessibleState(ui::AXViewState* state) override;
   bool OnMousePressed(const ui::MouseEvent& event) override;
   bool OnKeyPressed(const ui::KeyEvent& event) override;
   bool OnKeyReleased(const ui::KeyEvent& event) override;
   void OnPaint(gfx::Canvas* canvas) override;
   void OnFocus() override;
   void OnBlur() override;
   void Layout() override;
 
@@ skipping 45 matching lines @@
   base::string16 display_source_;
 
   std::unique_ptr<views::Painter> focus_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageView);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_