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 cf0f8293490855e59d509795365075686b551dd9..3db4b27bdd791f17ecec111e5ee76c008178aac2 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;