Replace uses of raw uint32's with a type-checked RtpTimeTicks data type.

media/cast/net/rtcp/rtcp_utility.h

Index: media/cast/net/rtcp/rtcp_utility.h
diff --git a/media/cast/net/rtcp/rtcp_utility.h b/media/cast/net/rtcp/rtcp_utility.h
index 0813bc9a46180201b97a26fa5f315a82d0ee1516..aa385f83cfa7b89ec18e9717a2e4f57755d40359 100644
--- a/media/cast/net/rtcp/rtcp_utility.h
+++ b/media/cast/net/rtcp/rtcp_utility.h
@@ -88,8 +88,8 @@ class RtcpParser {
   bool ParseExtendedReportDelaySinceLastReceiverReport(
       base::BigEndianReader* reader);
 
-  uint32_t local_ssrc_;
-  uint32_t remote_ssrc_;
+  const uint32_t local_ssrc_;
+  const uint32_t remote_ssrc_;
 
   bool has_sender_report_;
   RtcpSenderInfo sender_report_;
@@ -107,6 +107,11 @@ class RtcpParser {
   bool has_receiver_reference_time_report_;
   RtcpReceiverReferenceTimeReport receiver_reference_time_report_;
 
+  // Tracks recently-parsed RTP timestamps so that the truncated values can be
+  // re-expanded into full-form.
+  RtpTimeTicks last_parsed_sr_rtp_timestamp_;
+  RtpTimeTicks last_parsed_frame_log_rtp_timestamp_;
+
   DISALLOW_COPY_AND_ASSIGN(RtcpParser);
 };