Give up focus if the focused view becomes unfocusable

ui/message_center/views/message_center_view.cc

 // Copyright (c) 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.
 
 #include "ui/message_center/views/message_center_view.h"
 
 #include <list>
 #include <map>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 1011 matching lines @@
   // |focus_manager| can be NULL in tests.
   if (focus_manager)
     focused_view = focus_manager->GetFocusedView();
 
   // All the children of this view are owned by |this|.
   scroller_->contents()->RemoveAllChildViews(/*delete_children=*/false);
   scroller_->contents()->AddChildView(
       no_message_views ? empty_list_view_.get() : message_list_view_.get());
 
   button_bar_->SetCloseAllButtonEnabled(!no_message_views);
-  scroller_->set_focusable(!no_message_views);
+  scroller_->SetFocusable(!no_message_views);
 
   if (focus_manager && focused_view)
     focus_manager->SetFocusedView(focused_view);
 
   scroller_->InvalidateLayout();
   PreferredSizeChanged();
   Layout();
 }
 
 void MessageCenterView::SetNotificationViewForTest(MessageView* view) {
   message_list_view_->AddNotificationAt(view, 0);
 }
 
 }  // namespace message_center