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

media/cast/net/cast_transport_config.cc

Index: media/cast/net/cast_transport_config.cc
diff --git a/media/cast/net/cast_transport_config.cc b/media/cast/net/cast_transport_config.cc
index 23f84eb7ecbc06b34f91ebebe46bc992f6c753fc..7369cae12aa3eae3549a9cfe85dae29d3be31192 100644
--- a/media/cast/net/cast_transport_config.cc
+++ b/media/cast/net/cast_transport_config.cc
@@ -16,7 +16,6 @@ EncodedFrame::EncodedFrame()
     : dependency(UNKNOWN_DEPENDENCY),
       frame_id(0),
       referenced_frame_id(0),
-      rtp_timestamp(0),
       new_playout_delay_ms(0) {}
 
 EncodedFrame::~EncodedFrame() {}
@@ -34,7 +33,6 @@ void EncodedFrame::CopyMetadataTo(EncodedFrame* dest) const {
 RtcpSenderInfo::RtcpSenderInfo()
     : ntp_seconds(0),
       ntp_fraction(0),
-      rtp_timestamp(0),
       send_packet_count(0),
       send_octet_count(0) {}
 RtcpSenderInfo::~RtcpSenderInfo() {}