Incorporating logging into Cast

media/cast/cast_defines.h

Index: media/cast/cast_defines.h
diff --git a/media/cast/cast_defines.h b/media/cast/cast_defines.h
index a49ce207f589d0bf0a013e74ff27c20a67be04c6..5eff0d74ac07f46c8b37d7809d73bfce0a4165dd 100644
--- a/media/cast/cast_defines.h
+++ b/media/cast/cast_defines.h
@@ -186,6 +186,13 @@ inline std::string GetAesNonce(uint32 frame_id, const std::string& iv_mask) {
   return aes_nonce;
 }
 
+inline uint32 GetVideoRtpTimestamp(const base::TimeTicks& time_ticks) {
+  base::TimeTicks zero_time;
+  base::TimeDelta recorded_delta = time_ticks - zero_time;
+  // Timestamp is in 90 KHz for video.
+  return static_cast<uint32>(recorded_delta.InMilliseconds() * 90);
+}
+
 }  // namespace cast
 }  // namespace media