ash: Reorder shutdown of ShelfLayoutManager and StatusAreaWidget

ash/shelf/shelf_layout_manager.cc

 // 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.
 
 #include "ash/shelf/shelf_layout_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <cstring>
 #include <string>
@@ skipping 230 matching lines @@
   }
   Shell::GetInstance()->lock_state_controller()->AddObserver(this);
   aura::client::GetActivationClient(root_window_)->AddObserver(this);
   Shell::GetInstance()->session_state_delegate()->AddSessionStateObserver(this);
 }
 
 ShelfLayoutManager::~ShelfLayoutManager() {
   if (update_shelf_observer_)
     update_shelf_observer_->Detach();
 
-  FOR_EACH_OBSERVER(ShelfLayoutManagerObserver, observers_, WillDeleteShelf());
+  FOR_EACH_OBSERVER(ShelfLayoutManagerObserver, observers_,
+                    WillDeleteShelfLayoutManager());
   Shell::GetInstance()->RemoveShellObserver(this);
   Shell::GetInstance()->lock_state_controller()->RemoveObserver(this);
   Shell::GetInstance()->
       session_state_delegate()->RemoveSessionStateObserver(this);
   if (root_window_controller_observer_) {
     wm::WmWindowAura::Get(root_window_)
         ->GetRootWindowController()
         ->RemoveObserver(root_window_controller_observer_.get());
   }
 }
@@ skipping 883 matching lines @@
   UpdateBoundsAndOpacity(target_bounds, true, NULL);
   UpdateVisibilityState();
 }
 
 void ShelfLayoutManager::UpdateShelfVisibilityAfterLoginUIChange() {
   UpdateVisibilityState();
   LayoutShelf();
 }
 
 }  // namespace ash