Fixed a bug in QuicPacketCreator when FEC was used for unsupported

net/quic/quic_packet_creator.h

Index: net/quic/quic_packet_creator.h
diff --git a/net/quic/quic_packet_creator.h b/net/quic/quic_packet_creator.h
index e3e84f477b1e6df6d5dea3c9e9ffd28f46d8d822..83494da527790854dd672f7fd00bf378480b90db 100644
--- a/net/quic/quic_packet_creator.h
+++ b/net/quic/quic_packet_creator.h
@@ -115,6 +115,14 @@ class NET_EXPORT_PRIVATE QuicPacketCreator : public QuicFecBuilderInterface {
   // Returns true if there are frames pending to be serialized.
   bool HasPendingFrames();
 
+  // Returns IN_FEC_GROUP or NOT_IN_FEC_GROUP, depending on whether FEC is
+  // enabled or not. Note: This does not mean that an FEC group is currently
+  // active; i.e., fec_group_.get() may still be NULL.
+  // TODO(jri): Straighten out naming: Enabling FEC for the connection
+  // should use FEC_ENABLED/DISABLED, and IN_FEC_GROUP/NOT_IN_FEC_GROUP should
+  // be used if a given packet is in an fec group.
+  InFecGroup IsFecEnabled() const;
+
   // Returns the number of bytes which are available to be used by additional
   // frames in the packet.  Since stream frames are slightly smaller when they
   // are the last frame in a packet, this method will return a different