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 dcd433e756f0018080bb8f7201fca91f36291d0f..29e2d41d31080ec17554ae403420852775769fae 100644
--- a/media/cast/test/cast_benchmarks.cc
+++ b/media/cast/test/cast_benchmarks.cc
@@ -128,7 +128,7 @@ class CastTransportSenderWrapper : public CastTransportSender {
 
   void SendSenderReport(uint32_t ssrc,
                         base::TimeTicks current_time,
-                        uint32_t current_time_as_rtp_timestamp) final {
+                        RtpTimeTicks current_time_as_rtp_timestamp) final {
     transport_->SendSenderReport(ssrc,
                                  current_time,
                                  current_time_as_rtp_timestamp);