Bring back InterArrivalReceiver and rename it to TimestampeReceiver.

net/quic/congestion_control/receive_algorithm_interface.cc

Index: net/quic/congestion_control/receive_algorithm_interface.cc
diff --git a/net/quic/congestion_control/receive_algorithm_interface.cc b/net/quic/congestion_control/receive_algorithm_interface.cc
index cdc6afeae54aef0e6eeb40cc13b703178ded4921..4f608580c7f993047df68fd482c98639cb56e877 100644
--- a/net/quic/congestion_control/receive_algorithm_interface.cc
+++ b/net/quic/congestion_control/receive_algorithm_interface.cc
@@ -5,6 +5,7 @@
 #include "net/quic/congestion_control/receive_algorithm_interface.h"
 
 #include "net/quic/congestion_control/tcp_receiver.h"
+#include "net/quic/congestion_control/timestamp_receiver.h"
 
 namespace net {
 
@@ -15,9 +16,7 @@ ReceiveAlgorithmInterface* ReceiveAlgorithmInterface::Create(
     case kTCP:
       return new TcpReceiver();
     case kTimestamp:
-      // TODO(cyr): Support this by returning the TcpReceiver.
-      LOG(DFATAL) << "TimestampCongestionFeedback is not supported.";
-      return NULL;
+      return new TimestampReceiver();
   }
   return NULL;
 }