Cleanup AudioDeviceThread to avoid accidental misuse.

content/browser/audio_device_thread.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 "content/browser/audio_device_thread.h"
+
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
-#include "content/browser/audio_device_thread.h"
 
 namespace content {
 
-scoped_refptr<base::SingleThreadTaskRunner> AudioDeviceThread::GetTaskRunner() {
-#if defined(OS_MACOSX)
-    // On Mac audio task runner must belong to the main thread.
-    // See http://crbug.com/158170.
-    return base::ThreadTaskRunnerHandle::Get();
-#else
-    return thread_.task_runner();
-#endif  // defined(OS_MACOSX)
-  }
-
 AudioDeviceThread::AudioDeviceThread() : thread_("AudioThread") {
 #if defined(OS_WIN)
   thread_.init_com_with_mta(true);
 #endif
   CHECK(thread_.Start());
+
+#if defined(OS_MACOSX)
+  // On Mac audio task runner must belong to the main thread.

[Avi (use Gerrit), 2016/12/13 01:36:11]

Grammar? "On the Mac, the audio ..."

+  // See http://crbug.com/158170.
+  task_runner_ = base::ThreadTaskRunnerHandle::Get();
+#else
+  task_runner_ = thread_.task_runner();
+#endif
 }
 
+AudioDeviceThread::~AudioDeviceThread() {}
+
 }  // namespace content