[Cast] RTT clean-up to the max!

chrome/renderer/media/cast_ipc_dispatcher.cc

Index: chrome/renderer/media/cast_ipc_dispatcher.cc
diff --git a/chrome/renderer/media/cast_ipc_dispatcher.cc b/chrome/renderer/media/cast_ipc_dispatcher.cc
index 684bc9a765666570afead4bc614fce2f1eb5a60a..bb927bd08af160bcdc135106aca46112bdb6c94a 100644
--- a/chrome/renderer/media/cast_ipc_dispatcher.cc
+++ b/chrome/renderer/media/cast_ipc_dispatcher.cc
@@ -102,10 +102,10 @@ void CastIPCDispatcher::OnRawEvents(
 
 void CastIPCDispatcher::OnRtt(int32 channel_id,
                               uint32 ssrc,
-                              const media::cast::RtcpRttReport& rtt_report) {
+                              base::TimeDelta rtt) {
   CastTransportSenderIPC* sender = id_map_.Lookup(channel_id);
   if (sender) {
-    sender->OnRtt(ssrc, rtt_report);
+    sender->OnRtt(ssrc, rtt);
   } else {
     DVLOG(1) << "CastIPCDispatcher::OnRtt on non-existing channel.";
   }