ash: Reorder shutdown of ShelfLayoutManager and StatusAreaWidget

ash/shelf/shelf_tooltip_manager.h

 // Copyright 2013 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_SHELF_SHELF_TOOLTIP_MANAGER_H_
 #define ASH_SHELF_SHELF_TOOLTIP_MANAGER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_layout_manager_observer.h"
 #include "base/macros.h"
@@ skipping 54 matching lines @@
 
   // views::PointerWatcher overrides:
   void OnMousePressed(const ui::MouseEvent& event,
                       const gfx::Point& location_in_screen,
                       views::Widget* target) override;
   void OnTouchPressed(const ui::TouchEvent& event,
                       const gfx::Point& location_in_screen,
                       views::Widget* target) override;
 
   // ShelfLayoutManagerObserver overrides:
-  void WillDeleteShelf() override;
+  void WillDeleteShelfLayoutManager() override;
   void WillChangeVisibilityState(ShelfVisibilityState new_state) override;
   void OnAutoHideStateChanged(ShelfAutoHideState new_state) override;
 
  private:
   class ShelfTooltipBubble;
   friend class test::ShelfViewTest;
   friend class test::ShelfTooltipManagerTest;
 
   int timer_delay_;
   base::OneShotTimer timer_;
 
   ShelfView* shelf_view_;
   aura::Window* root_window_;
   ShelfLayoutManager* shelf_layout_manager_;
   views::BubbleDialogDelegateView* bubble_;
 
   base::WeakPtrFactory<ShelfTooltipManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfTooltipManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_TOOLTIP_MANAGER_H_