Remove FixRate congestion frame type.

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 f5672f804156fe3c61fef3b9ba77a1934529e24c..8d1a39ce745f202632697e0fb0c95e899aac92f3 100644
--- a/net/quic/congestion_control/receive_algorithm_interface.cc
+++ b/net/quic/congestion_control/receive_algorithm_interface.cc
@@ -4,7 +4,6 @@
 
 #include "net/quic/congestion_control/receive_algorithm_interface.h"
 
-#include "net/quic/congestion_control/fix_rate_receiver.h"
 #include "net/quic/congestion_control/tcp_receiver.h"
 
 namespace net {
@@ -18,8 +17,6 @@ ReceiveAlgorithmInterface* ReceiveAlgorithmInterface::Create(
     case kInterArrival:
       LOG(DFATAL) << "InterArrivalSendAlgorithm no longer supported.";
       return NULL;
-    case kFixRate:
-      return new FixRateReceiver();
   }
   return NULL;
 }