Support configuring number of audio buffers in MediaStream Pepper API.

ppapi/shared_impl/media_stream_audio_track_shared.h

Index: ppapi/shared_impl/media_stream_audio_track_shared.h
diff --git a/ppapi/shared_impl/media_stream_audio_track_shared.h b/ppapi/shared_impl/media_stream_audio_track_shared.h
new file mode 100644
index 0000000000000000000000000000000000000000..c64d3dedad168ca5ea7eda2863fe2c86f450983b
--- /dev/null
+++ b/ppapi/shared_impl/media_stream_audio_track_shared.h
@@ -0,0 +1,25 @@
+// 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.
+
+#ifndef PPAPI_SHARED_IMPL_MEDIA_STREAM_AUDIO_TRACK_SHARED_H_
+#define PPAPI_SHARED_IMPL_MEDIA_STREAM_AUDIO_TRACK_SHARED_H_
+
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/ppb_audio_buffer.h"
+
+namespace ppapi {
+
+class PPAPI_SHARED_EXPORT MediaStreamAudioTrackShared {
+ public:
+  struct Attributes {
+    Attributes() : buffers(0) {}
+    int32_t buffers;
+  };
+
+  static bool VerifyAttributes(const Attributes& attributes);
+};
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_MEDIA_STREAM_AUDIO_TRACK_SHARED_H_