Revert 152135 - Fix accessability for web notification tray.

ash/system/status_area_widget.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/system/status_area_widget.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
@@ skipping 309 matching lines @@
   Init(params);
   set_focus_on_creation(false);
   SetContentsView(status_area_widget_delegate_);
   GetNativeView()->SetName("StatusAreaWidget");
 }
 
 StatusAreaWidget::~StatusAreaWidget() {
 }
 
 void StatusAreaWidget::CreateTrayViews(ShellDelegate* shell_delegate) {
+  AddWebNotificationTray();
   AddSystemTray(shell_delegate);
-  AddWebNotificationTray();
   // Initialize() must be called after all trays have been created.
   if (system_tray_)
     system_tray_->Initialize();
   if (web_notification_tray_)
     web_notification_tray_->Initialize();
   UpdateAfterLoginStatusChange(system_tray_delegate_->GetUserLoginStatus());
 }
 
 void StatusAreaWidget::Shutdown() {
   // Destroy the trays early, causing them to be removed from the view
@@ skipping 83 matching lines @@
          web_notification_tray_->IsMouseInNotificationBubble());
   }
   if (should_show_launcher != should_show_launcher_) {
     should_show_launcher_ = should_show_launcher;
     Shell::GetInstance()->shelf()->UpdateAutoHideState();
   }
 }
 
 }  // namespace internal
 }  // namespace ash