Use a direct include of the message_loop header in media/.

media/filters/chunk_demuxer_unittest.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 <algorithm>
 
 #include "base/bind.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/decrypt_config.h"
 #include "media/base/mock_demuxer_host.h"
 #include "media/base/test_data_util.h"
 #include "media/base/test_helpers.h"
 #include "media/filters/chunk_demuxer.h"
 #include "media/webm/cluster_builder.h"
 #include "media/webm/webm_constants.h"
 #include "media/webm/webm_crypto_helpers.h"
@@ skipping 2628 matching lines @@
   // don't get removed.
   //
   // NOTE: The current GC algorithm tries to preserve the GOP at the
   //  current position as well as the last appended GOP. This is
   //  why there are 2 ranges in the expectations.
   AppendSingleStreamCluster(kSourceId, kAudioTrackNum, 700, 5);
   CheckExpectedRanges(kSourceId, "{ [500,592) [792,815) }");
 }
 
 }  // namespace media