Change IETF Frame/QUIC_VERSION_99 tests to be symbolic.

This CL replaces checks for QUIC_VERSION_99 that are controlling the IETF frames and their associated functionality with a function call . The function has a name that is indicative of the features for which the version is being checked -- VersionHasIetfQuicFrames().

gfe-relnote: N/A just changes the text by which we test if IETF QUIC has been negotiated.
PiperOrigin-RevId: 253767805
Change-Id: I08ae6738411ac151f90d5d085ea69af90d79fb80
diff --git a/quic/core/http/quic_server_session_base.cc b/quic/core/http/quic_server_session_base.cc
index 683793d..8670e29 100644
--- a/quic/core/http/quic_server_session_base.cc
+++ b/quic/core/http/quic_server_session_base.cc
@@ -224,7 +224,7 @@
   }
 
   if (!GetQuicReloadableFlag(quic_use_common_stream_check) &&
-      connection()->transport_version() != QUIC_VERSION_99) {
+      !VersionHasIetfQuicFrames(connection()->transport_version())) {
     if (GetNumOpenOutgoingStreams() >=
         stream_id_manager().max_open_outgoing_streams()) {
       QUIC_VLOG(1) << "No more streams should be created. "
@@ -248,7 +248,7 @@
   }
 
   if (!GetQuicReloadableFlag(quic_use_common_stream_check) &&
-      connection()->transport_version() != QUIC_VERSION_99) {
+      !VersionHasIetfQuicFrames(connection()->transport_version())) {
     if (GetNumOpenOutgoingStreams() >=
         stream_id_manager().max_open_outgoing_streams()) {
       QUIC_VLOG(1) << "No more streams should be created. "