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

media/cast/sender/fake_software_video_encoder.cc

Index: media/cast/sender/fake_software_video_encoder.cc
diff --git a/media/cast/sender/fake_software_video_encoder.cc b/media/cast/sender/fake_software_video_encoder.cc
index 3c33152c68f56e8d6c306f9e3fa58ad410d4c272..1e75b8a73c4e88b3dd6c354a3fbf52a8a6effd37 100644
--- a/media/cast/sender/fake_software_video_encoder.cc
+++ b/media/cast/sender/fake_software_video_encoder.cc
@@ -7,7 +7,7 @@
 #include "base/json/json_writer.h"
 #include "base/values.h"
 #include "media/base/video_frame.h"
-#include "media/cast/cast_defines.h"
+#include "media/cast/common/rtp_time.h"
 #include "media/cast/constants.h"
 
 #ifndef OFFICIAL_BUILD
@@ -48,7 +48,7 @@ void FakeSoftwareVideoEncoder::Encode(
     encoded_frame->referenced_frame_id = encoded_frame->frame_id - 1;
   }
   encoded_frame->rtp_timestamp =
-      TimeDeltaToRtpDelta(video_frame->timestamp(), kVideoFrequency);
+      RtpTimeTicks::FromTimeDelta(video_frame->timestamp(), kVideoFrequency);
   encoded_frame->reference_time = reference_time;
 
   base::DictionaryValue values;