Make MessageCenter a singleton object and build on Windows.

chrome/browser/notifications/message_center_notification_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 "chrome/browser/notifications/message_center_notification_manager.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
+#include "ui/message_center/message_center.h"
 
 MessageCenterNotificationManager::MessageCenterNotificationManager() {
+  message_center_ = message_center::MessageCenter::GetInstance();

[stevenjb, 2012/12/27 19:49:34]

We don't need to seem to need this yet - maybe wait until we do to add it?

[dewittj, 2012/12/27 23:38:50]

Done.

Good idea.

 }
 
 MessageCenterNotificationManager::~MessageCenterNotificationManager() {
 }
 
 bool MessageCenterNotificationManager::CancelById(const std::string& id) {
   // See if this ID hasn't been shown yet.
   if (NotificationUIManagerImpl::CancelById(id))
     return true;
 
@@ skipping 32 matching lines @@
 }
 
 bool MessageCenterNotificationManager::UpdateNotification(
     const Notification& notification) {
   const string16& replace_id = notification.replace_id();
   DCHECK(!replace_id.empty());
 
   NOTIMPLEMENTED();
   return false;
 }