arc: Make ChromeVox read an ARC custom notification

ui/arc/notification/arc_custom_notification_view.h

 // Copyright 2016 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_ARC_NOTIFICATION_ARC_CUSTOM_NOTIFICATION_VIEW_H_
 #define UI_ARC_NOTIFICATION_ARC_CUSTOM_NOTIFICATION_VIEW_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 29 matching lines @@
   class EventForwarder;
   class SlideHelper;
 
   void CreateFloatingCloseButton();
   void SetSurface(exo::NotificationSurface* surface);
   void UpdatePreferredSize();
   void UpdateCloseButtonVisiblity();
   void UpdatePinnedState();
   void UpdateSnapshot();
   void AttachSurface();
+  void UpdateAccessibleName();
 
   // views::NativeViewHost
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
   void Layout() override;
   void OnPaint(gfx::Canvas* canvas) override;
   void OnKeyEvent(ui::KeyEvent* event) override;
   void OnGestureEvent(ui::GestureEvent* event) override;
   void OnMouseEntered(const ui::MouseEvent& event) override;
   void OnMouseExited(const ui::MouseEvent& event) override;
@@ skipping 38 matching lines @@
   std::unique_ptr<views::Widget> floating_close_button_widget_;
 
   views::ImageButton* floating_close_button_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(ArcCustomNotificationView);
 };
 
 }  // namespace arc
 
 #endif  // UI_ARC_NOTIFICATION_ARC_CUSTOM_NOTIFICATION_VIEW_H_