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

media/cast/net/cast_transport_config.h

Index: media/cast/net/cast_transport_config.h
diff --git a/media/cast/net/cast_transport_config.h b/media/cast/net/cast_transport_config.h
index 7cdeec9dd2370e3eb7630bcdd91bbb72bd788ec0..b4427dfb87d2ebb0283a2f8bc571b6a96f9b3142 100644
--- a/media/cast/net/cast_transport_config.h
+++ b/media/cast/net/cast_transport_config.h
@@ -10,6 +10,7 @@
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/stl_util.h"
+#include "media/cast/common/rtp_time.h"
 #include "media/cast/net/cast_transport_defines.h"
 
 namespace media {
@@ -100,7 +101,7 @@ struct EncodedFrame {
   // samples encoded in all prior frames.  A playback system uses this value to
   // detect gaps in the stream, and otherwise stretch the signal to match
   // playout targets.
-  uint32 rtp_timestamp;
+  RtpTimeTicks rtp_timestamp;
 
   // The common reference clock timestamp for this frame.  This value originates
   // from a sender and is used to provide lip synchronization between streams in
@@ -145,7 +146,7 @@ struct RtcpSenderInfo {
   // First two members are used for rtt.
   uint32 ntp_seconds;
   uint32 ntp_fraction;
-  uint32 rtp_timestamp;
+  RtpTimeTicks rtp_timestamp;
   uint32 send_packet_count;
   size_t send_octet_count;
 };