Use a direct include of the message_loop header in content/, part 4.

content/renderer/media/buffered_resource_loader_unittest.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 <algorithm>
 #include <string>
 
 #include "base/bind.h"
 #include "base/format_macros.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "content/renderer/media/buffered_resource_loader.h"
 #include "media/base/media_log.h"
 #include "media/base/seekable_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_util.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
@@ skipping 1101 matching lines @@
   ExpectContentRangeFailure("bytes 20-10/400");
 
   ExpectContentRangeSuccess("bytes 0-499/500", 0, 499, 500);
   ExpectContentRangeSuccess("bytes 0-0/500", 0, 0, 500);
   ExpectContentRangeSuccess("bytes 10-11/50", 10, 11, 50);
   ExpectContentRangeSuccess("bytes 10-11/*", 10, 11,
                             kPositionNotSpecified);
 }
 
 }  // namespace content