fix bug in QUIC force HOL blocking experiment, guarded by --quic_enable_version_36_v2.

net/quic/core/quic_protocol.cc

Index: net/quic/core/quic_protocol.cc
diff --git a/net/quic/core/quic_protocol.cc b/net/quic/core/quic_protocol.cc
index dd908d1ff6f9b611fe7f1f1e53b8a0c1fa13dc31..586e3160a18600880b41e4b2649b1adfc9603616 100644
--- a/net/quic/core/quic_protocol.cc
+++ b/net/quic/core/quic_protocol.cc
@@ -192,7 +192,7 @@ QuicVersionVector FilterSupportedVersions(QuicVersionVector versions) {
         filtered_versions.push_back(version);
       }
     } else if (version == QUIC_VERSION_36) {
-      if (FLAGS_quic_enable_version_35 && FLAGS_quic_enable_version_36) {
+      if (FLAGS_quic_enable_version_35 && FLAGS_quic_enable_version_36_v2) {
         filtered_versions.push_back(version);
       }
     } else {
@@ -850,16 +850,16 @@ StringPiece QuicPacket::Plaintext(QuicVersion version) const {
 
 QuicVersionManager::QuicVersionManager(QuicVersionVector supported_versions)
     : enable_quic_version_35_(FLAGS_quic_enable_version_35),
-      enable_quic_version_36_(FLAGS_quic_enable_version_36),
+      enable_quic_version_36_(FLAGS_quic_enable_version_36_v2),
       allowed_supported_versions_(supported_versions),
       filtered_supported_versions_(
           FilterSupportedVersions(supported_versions)) {}
 
 const QuicVersionVector& QuicVersionManager::GetSupportedVersions() {
   if (enable_quic_version_35_ != FLAGS_quic_enable_version_35 ||
-      enable_quic_version_36_ != FLAGS_quic_enable_version_36) {
+      enable_quic_version_36_ != FLAGS_quic_enable_version_36_v2) {
     enable_quic_version_35_ = FLAGS_quic_enable_version_35;
-    enable_quic_version_36_ = FLAGS_quic_enable_version_36;
+    enable_quic_version_36_ = FLAGS_quic_enable_version_36_v2;
     filtered_supported_versions_ =
         FilterSupportedVersions(allowed_supported_versions_);
   }