Remove FEC from send path.

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index fa17503223d0c167d29881e76fd0274390719c74..48473c672a2a36bc8d1f3676ccbd627a13b72211 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -344,10 +344,7 @@ class NET_EXPORT_PRIVATE QuicConnection
   // Returns a pair with the number of bytes consumed from data, and a boolean
   // indicating if the fin bit was consumed.  This does not indicate the data
   // has been sent on the wire: it may have been turned into a packet and queued
-  // if the socket was unexpectedly blocked. |fec_protection| indicates if
-  // data is to be FEC protected. Note that data that is sent immediately
-  // following MUST_FEC_PROTECT data may get protected by falling within the
-  // same FEC group.
+  // if the socket was unexpectedly blocked.
   // If |listener| is provided, then it will be informed once ACKs have been
   // received for all the packets written in this call.
   // The |listener| is not owned by the QuicConnection and must outlive it.
@@ -355,7 +352,6 @@ class NET_EXPORT_PRIVATE QuicConnection
                                           QuicIOVector iov,
                                           QuicStreamOffset offset,
                                           bool fin,
-                                          FecProtection fec_protection,
                                           QuicAckListenerInterface* listener);
 
   // Send a RST_STREAM frame to the peer.
@@ -476,7 +472,6 @@ class NET_EXPORT_PRIVATE QuicConnection
   void OnSerializedPacket(SerializedPacket* packet) override;
   void OnUnrecoverableError(QuicErrorCode error,
                             ConnectionCloseSource source) override;
-  void OnResetFecGroup() override;
 
   // QuicSentPacketManager::NetworkChangeVisitor
   void OnCongestionWindowChange() override;
@@ -561,10 +556,6 @@ class NET_EXPORT_PRIVATE QuicConnection
   // remaining unacked packets.
   void OnRetransmissionTimeout();
 
-  // Called when a data packet is sent. Starts an alarm if the data sent in
-  // |packet_number| was FEC protected.
-  void MaybeSetFecAlarm(QuicPacketNumber packet_number);
-
   // Retransmits all unacked packets with retransmittable frames if
   // |retransmission_type| is ALL_UNACKED_PACKETS, otherwise retransmits only
   // initially encrypted packets. Used when the negotiated protocol version is
@@ -978,9 +969,6 @@ class NET_EXPORT_PRIVATE QuicConnection
 
   QuicPacketGenerator packet_generator_;
 
-  // An alarm that fires when an FEC packet should be sent.
-  QuicArenaScopedPtr<QuicAlarm> fec_alarm_;
-
   // Network idle time before this connection is closed.
   QuicTime::Delta idle_network_timeout_;
   // The connection will wait this long for the handshake to complete.