Remove FixRate congestion frame type.

net/quic/quic_framer.cc

Index: net/quic/quic_framer.cc
diff --git a/net/quic/quic_framer.cc b/net/quic/quic_framer.cc
index e3a6bf1c783334d2fb04285d0b44a0c12ec1f9fc..c0d423dea62b43011c8cc23b0157af4fd5c04ba7 100644
--- a/net/quic/quic_framer.cc
+++ b/net/quic/quic_framer.cc
@@ -1486,15 +1486,6 @@ bool QuicFramer::ProcessQuicCongestionFeedbackFrame(
       }
       break;
     }
-    case kFixRate: {
-      uint32 bitrate = 0;
-      if (!reader_->ReadUInt32(&bitrate)) {
-        set_detailed_error("Unable to read bitrate.");
-        return false;
-      }
-      frame->fix_rate.bitrate = QuicBandwidth::FromBytesPerSecond(bitrate);
-      break;
-    }
     case kTCP: {
       CongestionFeedbackMessageTCP* tcp = &frame->tcp;
       // TODO(ianswett): Remove receive window, since it's constant.
@@ -1831,9 +1822,6 @@ size_t QuicFramer::ComputeFrameLength(
           }
           break;
         }
-        case kFixRate:
-          len += 4;  // Bitrate.
-          break;
         case kTCP:
           len += 2;  // Receive window.
           break;
@@ -2182,14 +2170,6 @@ bool QuicFramer::AppendCongestionFeedbackFrame(
       }
       break;
     }
-    case kFixRate: {
-      const CongestionFeedbackMessageFixRate& fix_rate =
-          frame.fix_rate;
-      if (!writer->WriteUInt32(fix_rate.bitrate.ToBytesPerSecond())) {
-        return false;
-      }
-      break;
-    }
     case kTCP: {
       const CongestionFeedbackMessageTCP& tcp = frame.tcp;
       DCHECK_LE(tcp.receive_window, 1u << 20);