Fix status area accessability issues.

ash/system/web_notification/web_notification_tray.h

Index: ash/system/web_notification/web_notification_tray.h
diff --git a/ash/system/web_notification/web_notification_tray.h b/ash/system/web_notification/web_notification_tray.h
index 960ead86e73c8082b6138e7bb5cab7df05f0e033..a675cb228039f88eb496d5b9966e3bd3653d910c 100644
--- a/ash/system/web_notification/web_notification_tray.h
+++ b/ash/system/web_notification/web_notification_tray.h
@@ -116,8 +116,16 @@ class ASH_EXPORT WebNotificationTray : public internal::TrayBackgroundView {
   // Updates tray visibility login status of the system changes.
   void UpdateAfterLoginStatusChange(user::LoginStatus login_status);
 
+  // Returns true if the message center bubble is visible.
+  bool IsMessageCenterBubbleVisible() const;
+
+  // Returns true if the mouse is inside the notification bubble.
+  bool IsMouseInNotificationBubble() const;
+
   // Overridden from TrayBackgroundView.
   virtual void SetShelfAlignment(ShelfAlignment alignment) OVERRIDE;
+  virtual void AnchorUpdated() OVERRIDE;
+  virtual string16 GetAccessibleName() OVERRIDE;
 
   // Overridden from internal::ActionableView.
   virtual bool PerformAction(const ui::Event& event) OVERRIDE;