Automated IWYU fix for TaskRunner includes.

media/mojo/clients/mojo_audio_decoder_unittest.cc

 // Copyright 2016 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 <memory>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/audio_timestamp_helper.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/gmock_callback_support.h"
 #include "media/base/media_util.h"
 #include "media/base/mock_filters.h"
 #include "media/base/test_helpers.h"
 #include "media/mojo/clients/mojo_audio_decoder.h"
 #include "media/mojo/interfaces/audio_decoder.mojom.h"
@@ skipping 216 matching lines @@
   Initialize();
 
   // Choose a large number of decodes per test on purpose to expose potential
   // out of order delivery of mojo messages. See http://crbug.com/646054
   DecodeMultipleTimes(100);
 }
 
 // TODO(xhwang): Add more tests.
 
 }  // namespace media