relnote: Allowing multipath support negotiation. Protected by --quic_enable_multipath, default valu…

net/quic/quic_config.cc

Index: net/quic/quic_config.cc
diff --git a/net/quic/quic_config.cc b/net/quic/quic_config.cc
index 51e0a9af84f0583510ae3a1241e687c7868aeb8f..7dc93e5fc7c746265b0a7c90eb5b439ea2df0b39 100644
--- a/net/quic/quic_config.cc
+++ b/net/quic/quic_config.cc
@@ -343,7 +343,8 @@ QuicConfig::QuicConfig()
       initial_round_trip_time_us_(kIRTT, PRESENCE_OPTIONAL),
       initial_stream_flow_control_window_bytes_(kSFCW, PRESENCE_OPTIONAL),
       initial_session_flow_control_window_bytes_(kCFCW, PRESENCE_OPTIONAL),
-      socket_receive_buffer_(kSRBF, PRESENCE_OPTIONAL) {
+      socket_receive_buffer_(kSRBF, PRESENCE_OPTIONAL),
+      multipath_enabled_(kMPTH, PRESENCE_OPTIONAL) {
   SetDefaults();
 }
 
@@ -520,6 +521,15 @@ uint32_t QuicConfig::ReceivedSocketReceiveBuffer() const {
   return socket_receive_buffer_.GetReceivedValue();
 }
 
+void QuicConfig::SetMultipathEnabled(bool multipath_enabled) {
+  uint32_t value = multipath_enabled ? 1 : 0;
+  multipath_enabled_.set(value, value);
+}
+
+bool QuicConfig::MultipathEnabled() const {
+  return multipath_enabled_.GetUint32() > 0;
+}
+
 bool QuicConfig::negotiated() const {
   // TODO(ianswett): Add the negotiated parameters once and iterate over all
   // of them in negotiated, ToHandshakeMessage, ProcessClientHello, and