Automated IWYU fix for TaskRunner includes.

media/base/android/media_codec_loop.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 "media/base/android/media_codec_loop.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/timestamp_constants.h"
 
 namespace media {
 namespace {
 
 constexpr base::TimeDelta kDecodePollDelay =
     base::TimeDelta::FromMilliseconds(10);
 constexpr base::TimeDelta kNoWaitTimeout = base::TimeDelta::FromMicroseconds(0);
 constexpr base::TimeDelta kIdleTimerTimeout = base::TimeDelta::FromSeconds(1);
@@ skipping 340 matching lines @@
     RETURN_STRING(STATE_DRAINED);
     RETURN_STRING(STATE_ERROR);
   }
 #undef RETURN_STRING
 
   NOTREACHED() << "Unknown state " << state;
   return nullptr;
 }
 
 }  // namespace media