Cast: Add GetStats() extensions API.

media/cast/logging/logging_stats.h

Index: media/cast/logging/logging_stats.h
diff --git a/media/cast/logging/logging_stats.h b/media/cast/logging/logging_stats.h
index eb5745e7e2f87b5d78a3e02dda04302628f34cc8..e04db8d96f3bed96cedb6a3cadebc4b087830ca6 100644
--- a/media/cast/logging/logging_stats.h
+++ b/media/cast/logging/logging_stats.h
@@ -6,9 +6,14 @@
 #define MEDIA_CAST_LOGGING_LOGGING_STATS_H_
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/cast/logging/logging_defines.h"
 
+namespace base {
+class DictionaryValue;
+}
+
 namespace media {
 namespace cast {
 
@@ -47,9 +52,9 @@ class LoggingStats {
   void InsertGenericEvent(const base::TimeTicks& time_of_event,
                           CastLoggingEvent event, int value);
 
-  FrameStatsMap GetFrameStatsData() const;
+  FrameStatsMap GetFrameStatsData(EventMediaType media_type) const;
 
-  PacketStatsMap GetPacketStatsData() const;
+  PacketStatsMap GetPacketStatsData(EventMediaType media_type) const;
 
   GenericStatsMap GetGenericStatsData() const;
 
@@ -66,6 +71,12 @@ class LoggingStats {
   DISALLOW_COPY_AND_ASSIGN(LoggingStats);
 };
 
+// Converts stats provided in |frame_stats_map| and |packet_stats_map| to
+// base::DictionaryValue format. See .cc file for the exact structure.
+scoped_ptr<base::DictionaryValue> ConvertStats(
+    const FrameStatsMap& frame_stats_map,
+    const PacketStatsMap& packet_stats_map);
+
 }  // namespace cast
 }  // namespace media