Automated IWYU fix for TaskRunner includes.

media/gpu/ipc/service/gpu_jpeg_decode_accelerator_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/gpu/ipc/service/gpu_jpeg_decode_accelerator.h"
 #include "base/bind.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/test/scoped_task_environment.h"
 #include "base/threading/thread.h"
 #include "gpu/ipc/service/gpu_channel.h"
 #include "media/gpu/ipc/common/media_messages.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 using testing::SaveArg;
 using testing::InvokeWithoutArgs;
@@ skipping 104 matching lines @@
   EXPECT_CALL(*decoder_ptr, Decode(_, _));
   io_task_runner->PostTaskAndReply(
       FROM_HERE,
       base::Bind(&GpuJpegDecodeAcceleratorTest::SendStubFrame,
                  base::Unretained(this), message_filter, kArbitraryRouteId),
       run_loop2.QuitClosure());
   run_loop2.Run();
 }
 
 }  // namespace media