Automated IWYU fix for TaskRunner includes.

media/audio/audio_debug_recording_manager_unittest.cc

 // Copyright 2017 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/audio/audio_debug_recording_manager.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/test_message_loop.h"
 #include "media/audio/audio_debug_recording_helper.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 
 #if defined(OS_WIN)
 #define IntToStringType base::IntToString16
@@ skipping 196 matching lines @@
   for (const auto& recorder : recorders) {
     MockAudioDebugRecordingHelper* mock_recording_helper =
         static_cast<MockAudioDebugRecordingHelper*>(recorder.get());
     EXPECT_CALL(*mock_recording_helper, DisableDebugRecording());
   }
 
   manager_.DisableDebugRecording();
 }
 
 }  // namespace media