ash: Fix crash in launcher tooltip manager

ash/launcher/launcher_tooltip_manager.h

 // Copyright (c) 2012 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 ASH_LAUNCHER_LAUNCHER_TOOLTIP_MANAGER_H_
 #define ASH_LAUNCHER_LAUNCHER_TOOLTIP_MANAGER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_layout_manager_observer.h"
 #include "ash/shelf/shelf_types.h"
@@ skipping 56 matching lines @@
   // Resets the timer for the delayed showing |view_|.  If the timer isn't
   // running, it starts a new timer.
   void ResetTimer();
 
   // Stops the timer for the delayed showing |view_|.
   void StopTimer();
 
   // 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();
 
 protected:
   // ui::EventHandler overrides:
   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
   virtual void OnCancelMode(ui::CancelModeEvent* event) OVERRIDE;
 
@@ skipping 25 matching lines @@
 
   base::WeakPtrFactory<LauncherTooltipManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherTooltipManager);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_LAUNCHER_TOOLTIP_MANAGER_H_