Use a direct include of the message_loop header in content/, part 3.

content/public/test/test_browser_thread_bundle.cc

 // Copyright 2013 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 "content/public/test/test_browser_thread_bundle.h"
 
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "content/public/test/test_browser_thread.h"
 
 namespace content {
 
 TestBrowserThreadBundle::TestBrowserThreadBundle() {
   Init(DEFAULT);
 }
 
 TestBrowserThreadBundle::TestBrowserThreadBundle(int options) {
@@ skipping 91 matching lines @@
   if (options & REAL_IO_THREAD) {
     io_thread_.reset(new TestBrowserThread(BrowserThread::IO));
     io_thread_->StartIOThread();
   } else {
     io_thread_.reset(
         new TestBrowserThread(BrowserThread::IO, message_loop_.get()));
   }
 }
 
 }  // namespace content