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

media/cast/net/rtp/rtp_packetizer_unittest.cc

Index: media/cast/net/rtp/rtp_packetizer_unittest.cc
diff --git a/media/cast/net/rtp/rtp_packetizer_unittest.cc b/media/cast/net/rtp/rtp_packetizer_unittest.cc
index 07eb4193347311f3ea7f5f452f1027b700553952..38d823171b05611bc0a853865b62deefca5b46cc 100644
--- a/media/cast/net/rtp/rtp_packetizer_unittest.cc
+++ b/media/cast/net/rtp/rtp_packetizer_unittest.cc
@@ -34,8 +34,7 @@ class TestRtpPacketTransport : public PacketSender {
         packets_sent_(0),
         expected_number_of_packets_(0),
         expected_packet_id_(0),
-        expected_frame_id_(0),
-        expected_rtp_timestamp_(0) {}
+        expected_frame_id_(0) {}
 
   void VerifyRtpHeader(const RtpCastHeader& rtp_header) {
     VerifyCommonRtpHeader(rtp_header);
@@ -85,7 +84,7 @@ class TestRtpPacketTransport : public PacketSender {
     expected_number_of_packets_ = expected_number_of_packets;
   }
 
-  void set_rtp_timestamp(uint32 rtp_timestamp) {
+  void set_rtp_timestamp(RtpTimeTicks rtp_timestamp) {
     expected_rtp_timestamp_ = rtp_timestamp;
   }
 
@@ -97,7 +96,7 @@ class TestRtpPacketTransport : public PacketSender {
   // Assuming packets arrive in sequence.
   int expected_packet_id_;
   uint32 expected_frame_id_;
-  uint32 expected_rtp_timestamp_;
+  RtpTimeTicks expected_rtp_timestamp_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestRtpPacketTransport);
@@ -122,7 +121,7 @@ class RtpPacketizerTest : public ::testing::Test {
     video_frame_.frame_id = 0;
     video_frame_.referenced_frame_id = video_frame_.frame_id - 1;
     video_frame_.data.assign(kFrameSize, 123);
-    video_frame_.rtp_timestamp = 0x0055aa11;
+    video_frame_.rtp_timestamp = RtpTimeTicks().Expand(UINT32_C(0x0055aa11));
   }
 
   void RunTasks(int during_ms) {