Simplify threading in browser thread by making only ChromeThread deal with di...

chrome/browser/notifications/notification_object_proxy.cc

 // Copyright (c) 2009 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/notification_object_proxy.h"
 
 #include "base/message_loop.h"
 #include "base/string16.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_thread.h"
@@ skipping 33 matching lines @@
     // TODO(johnnyg): http://crbug.com/23065  Worker support coming soon.
     NOTREACHED();
   } else {
     DeliverMessage(new ViewMsg_PostCloseToNotificationObject(
         route_id_, notification_id_, by_user));
   }
 }
 
 void NotificationObjectProxy::DeliverMessage(IPC::Message* message) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
-  MessageLoop* io_loop = ChromeThread::GetMessageLoop(ChromeThread::IO);
-  if (io_loop) {
-    io_loop->PostTask(FROM_HERE,
-        NewRunnableMethod(this, &NotificationObjectProxy::Send, message));
-  }
+  ChromeThread::PostTask(
+      ChromeThread::IO, FROM_HERE,
+      NewRunnableMethod(this, &NotificationObjectProxy::Send, message));
 }
 
 // Deferred method which runs on the IO thread and sends a message to the
 // proxied notification, routing it through the correct host in the browser.
 void NotificationObjectProxy::Send(IPC::Message* message) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
   RenderViewHost* host = RenderViewHost::FromID(process_id_, route_id_);
   if (host)
     host->Send(message);
 }