Support configuring number of audio buffers in MediaStream Pepper API.

ppapi/shared_impl/media_stream_audio_track_shared.cc

Index: ppapi/shared_impl/media_stream_audio_track_shared.cc
diff --git a/ppapi/shared_impl/media_stream_audio_track_shared.cc b/ppapi/shared_impl/media_stream_audio_track_shared.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ac649547d8c8bb32ac6248ef6de66033ef879641
--- /dev/null
+++ b/ppapi/shared_impl/media_stream_audio_track_shared.cc
@@ -0,0 +1,17 @@
+// 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"
+
+namespace ppapi {
+
+// static
+bool MediaStreamAudioTrackShared::VerifyAttributes(
+    const Attributes& attributes) {
+  if (attributes.buffers < 0)
+    return false;
+  return true;
+}
+
+}  // namespace ppapi