Changes the OnClick behavior in message center.

ui/message_center/message_center.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 "ui/message_center/message_center.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 
@@ skipping 122 matching lines @@
 }
 
 void MessageCenter::ShowNotificationSettings(const std::string& id) {
   if (delegate_)
     delegate_->ShowSettings(id);
 }
 
 void MessageCenter::OnNotificationClicked(const std::string& id) {
   if (delegate_)
     delegate_->OnClicked(id);
+  if (HasPopupNotifications()) {
+    notification_list_->MarkSinglePopupAsShown(id);
+    NotifyMessageCenterChanged(false);
+  }
 }
 
 void MessageCenter::OnQuietModeChanged(bool quiet_mode) {
   NotifyMessageCenterChanged(true);
 }
 
 void MessageCenter::OnButtonClicked(const std::string& id, int button_index) {
   if (delegate_)
     delegate_->OnButtonClicked(id, button_index);
 }
@@ skipping 15 matching lines @@
 }
 
 void MessageCenter::NotifyMessageCenterChanged(bool new_notification) {
   FOR_EACH_OBSERVER(Observer,
                     observer_list_,
                     OnMessageCenterChanged(new_notification));
 }
 
 
 }  // namespace message_center