Added battery level and time to the status tray's accessible name.

ash/system/tray/system_tray.h

Index: ash/system/tray/system_tray.h
diff --git a/ash/system/tray/system_tray.h b/ash/system/tray/system_tray.h
index 99f5de033c561d39838ad425abd351a95a22a1d0..2df725daac7d7a614633c59cb7d3afc805a0c9e8 100644
--- a/ash/system/tray/system_tray.h
+++ b/ash/system/tray/system_tray.h
@@ -161,6 +161,10 @@ class ASH_EXPORT SystemTray : public TrayBackgroundView,
   // Resets |notification_bubble_| and clears any related state.
   void DestroyNotificationBubble();
 
+  // Returns a string with the current time for accessibility on the status
+  // tray bar.
+  base::string16 GetAccessibleTimeString(const base::Time& now) const;
+
   // Calculates the x-offset for the item in the tray. Returns -1 if its tray
   // item view is not visible.
   int GetTrayXOffset(SystemTrayItem* item) const;