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

media/cast/test/cast_benchmarks.cc

Index: media/cast/test/cast_benchmarks.cc
diff --git a/media/cast/test/cast_benchmarks.cc b/media/cast/test/cast_benchmarks.cc
index 19d5edfea45a107e78e10184bf72121b0d52882f..6001e850e98818f79c97e76fa3c512c5f25476f5 100644
--- a/media/cast/test/cast_benchmarks.cc
+++ b/media/cast/test/cast_benchmarks.cc
@@ -127,7 +127,7 @@ class CastTransportSenderWrapper : public CastTransportSender {
 
   void SendSenderReport(uint32 ssrc,
                         base::TimeTicks current_time,
-                        uint32 current_time_as_rtp_timestamp) final {
+                        RtpTimeTicks current_time_as_rtp_timestamp) final {
     transport_->SendSenderReport(ssrc,
                                  current_time,
                                  current_time_as_rtp_timestamp);