API changes to Write path Session on down for FEC protection.

net/quic/quic_packet_generator.h

Index: net/quic/quic_packet_generator.h
diff --git a/net/quic/quic_packet_generator.h b/net/quic/quic_packet_generator.h
index e9c773b910ae3dd2ea2a4b97ffe08c82aa02d528..e5b8de4d3fc97d8bcf84017607cfb31e9749c6d0 100644
--- a/net/quic/quic_packet_generator.h
+++ b/net/quic/quic_packet_generator.h
@@ -122,6 +122,7 @@ class NET_EXPORT_PRIVATE QuicPacketGenerator {
                                const IOVector& data,
                                QuicStreamOffset offset,
                                bool fin,
+                               FecProtection fec_protection,
                                QuicAckNotifier* notifier);
 
   // Indicates whether batch mode is currently enabled.
@@ -150,14 +151,6 @@ class NET_EXPORT_PRIVATE QuicPacketGenerator {
   // creator, in which case, only the generator's state is altered.
   void MaybeStartFecProtection();
 
-  // Turn off FEC protection for subsequent packets. If |force| is true,
-  // force-closes any open FEC group, sends out an FEC packet if one was under
-  // construction, and turns off protection in the generator and creator. If
-  // |force| is false, does the same as above if the creator is ready to send
-  // and FEC packet. Note that when |force| is false, the creator may still have
-  // an open FEC group after this method runs.
-  void MaybeStopFecProtection(bool force);
-
   // Serializes and calls the delegate on an FEC packet if one was under
   // construction in the creator. When |force| is false, it relies on the
   // creator being ready to send an FEC packet, otherwise FEC packet is sent
@@ -189,7 +182,8 @@ class NET_EXPORT_PRIVATE QuicPacketGenerator {
   // True if batch mode is currently enabled.
   bool batch_mode_;
 
-  // True if FEC protection is on.
+  // True if FEC protection is on. The creator may have an open FEC group even
+  // if this variable is false.
   bool should_fec_protect_;
 
   // Flags to indicate the need for just-in-time construction of a frame.