ash: Fix crash in launcher tooltip manager

ash/launcher/launcher_tooltip_manager.h

Index: ash/launcher/launcher_tooltip_manager.h
diff --git a/ash/launcher/launcher_tooltip_manager.h b/ash/launcher/launcher_tooltip_manager.h
index 27d3554f2074241c695b4fc2249517d47465a94f..1e2ff3a32eeec27c8333d5b157d68fa665272d0a 100644
--- a/ash/launcher/launcher_tooltip_manager.h
+++ b/ash/launcher/launcher_tooltip_manager.h
@@ -74,6 +74,9 @@ class ASH_EXPORT LauncherTooltipManager : public ui::EventHandler,
   // Returns true if the tooltip is currently visible.
   bool IsVisible();
 
+  // Returns the view to which the tooltip bubble is anchored. May be NULL.
+  views::View* GetCurrentAnchorView() { return anchor_; }
+
   // Create an instant timer for test purposes.
   void CreateZeroDelayTimerForTest();