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

chrome/browser/media/cast_transport_host_filter_unittest.cc

Index: chrome/browser/media/cast_transport_host_filter_unittest.cc
diff --git a/chrome/browser/media/cast_transport_host_filter_unittest.cc b/chrome/browser/media/cast_transport_host_filter_unittest.cc
index 27aa970fd8a85fa88e5a92b585b0f124aaf2ab3c..fdb0fe6c95611a91fa95db189d9420ccb1c3f97f 100644
--- a/chrome/browser/media/cast_transport_host_filter_unittest.cc
+++ b/chrome/browser/media/cast_transport_host_filter_unittest.cc
@@ -106,8 +106,9 @@ TEST_F(CastTransportHostFilterTest, SimpleMessages) {
   audio_frame.dependency = media::cast::EncodedFrame::KEY;
   audio_frame.frame_id = 1;
   audio_frame.referenced_frame_id = 1;
-  audio_frame.rtp_timestamp = 47;
   const int kSamples = 47;
+  audio_frame.rtp_timestamp =
+      media::cast::RtpTimeTicks() + media::cast::RtpTimeDelta::FromTicks(47);
   const int kBytesPerSample = 2;
   const int kChannels = 2;
   audio_frame.data = std::string(kSamples * kBytesPerSample * kChannels, 'q');
@@ -126,7 +127,8 @@ TEST_F(CastTransportHostFilterTest, SimpleMessages) {
   FakeSend(insert_video_frame);
 
   CastHostMsg_SendSenderReport rtcp_msg(
-      kChannelId, 1, base::TimeTicks(), 2);
+      kChannelId, 1, base::TimeTicks(),
+      media::cast::RtpTimeTicks().Expand(UINT32_C(2)));
   FakeSend(rtcp_msg);
 
   std::vector<uint32> frame_ids;