Cast: Implemented size limiting and event filtering in EncodingEventSubscriber.

media/cast/logging/logging_defines.h

Index: media/cast/logging/logging_defines.h
diff --git a/media/cast/logging/logging_defines.h b/media/cast/logging/logging_defines.h
index 38d1b9f849edca40534b8f75f605b47df429b08c..a080228bb5f98afae7f1537befb148cdd73b8a6f 100644
--- a/media/cast/logging/logging_defines.h
+++ b/media/cast/logging/logging_defines.h
@@ -16,6 +16,8 @@ namespace cast {
 
 static const uint32 kFrameIdUnknown = 0xFFFFFFFF;
 
+typedef uint32 RtpTimestamp;
+
 struct CastLoggingConfig {
   // Constructs default config - all logging is disabled.
   CastLoggingConfig();
@@ -73,7 +75,10 @@ enum CastLoggingEvent {
 
 std::string CastLoggingToString(CastLoggingEvent event);
 
-typedef uint32 RtpTimestamp;
+// CastLoggingEvent are classified into one of three following types.
+enum EventMediaType { AUDIO_EVENT, VIDEO_EVENT, OTHER_EVENT };
+
+EventMediaType GetEventMediaType(CastLoggingEvent event);
 
 struct FrameEvent {
   FrameEvent();