Use base::MessageLoop in more files.

chrome/browser/printing/print_job.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/printing/print_job.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 88 matching lines @@
 void PrintJob::GetSettingsDone(const PrintSettings& new_settings,
                                PrintingContext::Result result) {
   NOTREACHED();
 }
 
 PrintJobWorker* PrintJob::DetachWorker(PrintJobWorkerOwner* new_owner) {
   NOTREACHED();
   return NULL;
 }
 
-MessageLoop* PrintJob::message_loop() {
+base::MessageLoop* PrintJob::message_loop() {
   return ui_message_loop_;
 }
 
 const PrintSettings& PrintJob::settings() const {
   return settings_;
 }
 
 int PrintJob::cookie() const {
   if (!document_.get())
     // Always use an invalid cookie in this case.
@@ skipping 274 matching lines @@
 
 PrintedDocument* JobEventDetails::document() const {
   return document_;
 }
 
 PrintedPage* JobEventDetails::page() const {
   return page_;
 }
 
 }  // namespace printing