Deprecate FLAGS_quic_enable_version_35.

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 c6cf8620e05220392780661299740d38b4221fe1..295e61f948ada1251bf0e685867845c4c0bbc86b 100644
--- a/net/quic/core/quic_protocol.cc
+++ b/net/quic/core/quic_protocol.cc
@@ -610,8 +610,7 @@ StringPiece QuicPacket::Plaintext(QuicVersion version) const {
 }
 
 QuicVersionManager::QuicVersionManager(QuicVersionVector supported_versions)
-    : enable_version_35_(FLAGS_quic_enable_version_35),
-      enable_version_36_(FLAGS_quic_enable_version_36_v2),
+    : enable_version_36_(FLAGS_quic_enable_version_36_v2),
       allowed_supported_versions_(supported_versions),
       filtered_supported_versions_(
           FilterSupportedVersions(supported_versions)) {}
@@ -619,9 +618,7 @@ QuicVersionManager::QuicVersionManager(QuicVersionVector supported_versions)
 QuicVersionManager::~QuicVersionManager() {}
 
 const QuicVersionVector& QuicVersionManager::GetSupportedVersions() {
-  if (enable_version_35_ != FLAGS_quic_enable_version_35 ||
-      enable_version_36_ != FLAGS_quic_enable_version_36_v2) {
-    enable_version_35_ = FLAGS_quic_enable_version_35;
+  if (enable_version_36_ != FLAGS_quic_enable_version_36_v2) {
     enable_version_36_ = FLAGS_quic_enable_version_36_v2;
     filtered_supported_versions_ =
         FilterSupportedVersions(allowed_supported_versions_);