Cast: Log whether the video frame is a key frame in kVideoFrameEncoded

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 348034558b93923bcdbe45f64d8de6c1e8857b54..2b7d2d31da9285fc00e5cc842b04caf5a7bf3a70 100644
--- a/media/cast/logging/logging_defines.h
+++ b/media/cast/logging/logging_defines.h
@@ -73,7 +73,8 @@ struct FrameEvent {
 
   RtpTimestamp rtp_timestamp;
   uint32 frame_id;
-  size_t size;  // Encoded size only.
+  // Size of encoded frame. Only set for kVideoFrameEncoded event.
+  size_t size;
 
   // Time of event logged.
   base::TimeTicks timestamp;
@@ -82,6 +83,9 @@ struct FrameEvent {
   // Render / playout delay. Only set for kAudioPlayoutDelay and
   // kVideoRenderDelay events.
   base::TimeDelta delay_delta;
+
+  // Whether the frame is a key frame. Only set for kVideoFrameEncoded event.
+  bool key_frame;
 };
 
 struct PacketEvent {