Cast: Add GetStats() extensions API.

media/cast/logging/stats_serializer.h

Index: media/cast/logging/stats_serializer.h
diff --git a/media/cast/logging/stats_serializer.h b/media/cast/logging/stats_serializer.h
new file mode 100644
index 0000000000000000000000000000000000000000..81879efde83c67f4bdcba512319472dfe2d37a8d
--- /dev/null
+++ b/media/cast/logging/stats_serializer.h
@@ -0,0 +1,23 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.

[Alpha Left Google, 2014/03/03 07:11:39]

I don't think we need to serialize the stats to JSON. media/cast API can return
a base::DictionaryValue.

[imcheng, 2014/03/04 02:06:24]

Done. I will rename this class to StatsConverter?

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_CAST_LOGGING_STATS_SERIALIZER_H_
+#define MEDIA_CAST_LOGGING_STATS_SERIALIZER_H_
+
+#include "media/cast/logging/logging_defines.h"
+
+namespace media {
+namespace cast {
+
+// Writes stats provided in |frame_stats_map| and |packet_stats_map| in JSON
+// format to |out|. See the .cc file for format. Returns |true| if serialization
+// was successful.
+bool SerializeStats(const FrameStatsMap& frame_stats_map,
+                    const PacketStatsMap& packet_stats_map,
+                    std::string* out);
+
+}  // namespace cast
+}  // namespace media
+
+#endif  // MEDIA_CAST_LOGGING_STATS_SERIALIZER_H_