Move test runner to a component

content/shell/renderer/test_runner/mock_web_audio_device.cc

Index: content/shell/renderer/test_runner/mock_web_audio_device.cc
diff --git a/content/shell/renderer/test_runner/mock_web_audio_device.cc b/content/shell/renderer/test_runner/mock_web_audio_device.cc
deleted file mode 100644
index e1b30f44e84f63a46127e50d60863a5a0c0272b5..0000000000000000000000000000000000000000
--- a/content/shell/renderer/test_runner/mock_web_audio_device.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2014 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/shell/renderer/test_runner/mock_web_audio_device.h"
-
-namespace content {
-
-MockWebAudioDevice::MockWebAudioDevice(double sample_rate)
-    : sample_rate_(sample_rate) {}
-
-MockWebAudioDevice::~MockWebAudioDevice() {}
-
-void MockWebAudioDevice::start() {}
-
-void MockWebAudioDevice::stop() {}
-
-double MockWebAudioDevice::sampleRate() {
-  return sample_rate_;
-}
-
-}  // namespace content