Support configuring number of audio buffers in MediaStream Pepper API.

ppapi/shared_impl/media_stream_audio_track_shared.cc

+// 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 "ppapi/shared_impl/media_stream_audio_track_shared.h"
+
+#include "base/logging.h"
+
+namespace ppapi {
+
+// static
+bool MediaStreamAudioTrackShared::VerifyAttributes(

[Peng, 2014/05/26 14:48:49]

Add unit tests please.
See ppapi/shared_impl/media_stream_video_track_shared_unittest.cc

[thembrown, 2014/05/27 10:36:02]

Done.

+    const Attributes& attributes) {
+  if (attributes.buffers < 0)
+    return false;
+  return true;
+}
+
+}  // namespace ppapi