Deprecate FLAGS_quic_enable_version_35.

net/quic/core/quic_versions.cc

Index: net/quic/core/quic_versions.cc
diff --git a/net/quic/core/quic_versions.cc b/net/quic/core/quic_versions.cc
index ff8c2d5ba24dc1fc475f8900465f1989cd5b8a99..363a59d91303c59b338510bd4dc1dfd105f61dd7 100644
--- a/net/quic/core/quic_versions.cc
+++ b/net/quic/core/quic_versions.cc
@@ -35,12 +35,8 @@ QuicVersionVector FilterSupportedVersions(QuicVersionVector versions) {
   QuicVersionVector filtered_versions(versions.size());
   filtered_versions.clear();  // Guaranteed by spec not to change capacity.
   for (QuicVersion version : versions) {
-    if (version == QUIC_VERSION_35) {
-      if (FLAGS_quic_enable_version_35) {
-        filtered_versions.push_back(version);
-      }
-    } else if (version == QUIC_VERSION_36) {
-      if (FLAGS_quic_enable_version_35 && FLAGS_quic_enable_version_36_v2) {
+    if (version == QUIC_VERSION_36) {
+      if (FLAGS_quic_enable_version_36_v2) {
         filtered_versions.push_back(version);
       }
     } else {