Automated IWYU fix for TaskRunner includes.

media/gpu/avda_codec_allocator_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 "media/gpu/avda_codec_allocator.h"
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "base/time/tick_clock.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::Invoke;
 using testing::NiceMock;
 using testing::_;
 
 namespace media {
@@ skipping 207 matching lines @@
       ->PostTask(FROM_HERE,
                  base::Bind(&SignalImmediately, &done_waiting_event));
   wait_event.Signal();
   done_waiting_event.Wait();
 
   // Verify that we've un-failed over.
   ASSERT_EQ(AUTO_CODEC, TaskTypeForAllocation(false));
 }
 
 }  // namespace media