test_runner: Migrate MockWebAudioDevice to our Chromium C++ style.

content/shell/renderer/test_runner/MockWebAudioDevice.cpp

Index: content/shell/renderer/test_runner/MockWebAudioDevice.cpp
diff --git a/content/shell/renderer/test_runner/MockWebAudioDevice.cpp b/content/shell/renderer/test_runner/MockWebAudioDevice.cpp
deleted file mode 100644
index 4ca2cd5ed76e67d297d8052b08415687a4c04caf..0000000000000000000000000000000000000000
--- a/content/shell/renderer/test_runner/MockWebAudioDevice.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2013 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/MockWebAudioDevice.h"
-
-namespace content {
-
-MockWebAudioDevice::MockWebAudioDevice(double sampleRate)
-    : m_sampleRate(sampleRate)
-{
-}
-
-MockWebAudioDevice::~MockWebAudioDevice()
-{
-}
-
-void MockWebAudioDevice::start()
-{
-}
-
-void MockWebAudioDevice::stop()
-{
-}
-
-double MockWebAudioDevice::sampleRate()
-{
-    return m_sampleRate;
-}
-
-}  // namespace content