Move Quic AppendTimestampFrame method out of AppendCongestionFrame.

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 8d1a39ce745f202632697e0fb0c95e899aac92f3..cdc6afeae54aef0e6eeb40cc13b703178ded4921 100644
--- a/net/quic/congestion_control/receive_algorithm_interface.cc
+++ b/net/quic/congestion_control/receive_algorithm_interface.cc
@@ -14,8 +14,9 @@ ReceiveAlgorithmInterface* ReceiveAlgorithmInterface::Create(
   switch (type) {
     case kTCP:
       return new TcpReceiver();
-    case kInterArrival:
-      LOG(DFATAL) << "InterArrivalSendAlgorithm no longer supported.";
+    case kTimestamp:
+      // TODO(cyr): Support this by returning the TcpReceiver.
+      LOG(DFATAL) << "TimestampCongestionFeedback is not supported.";
       return NULL;
   }
   return NULL;