[SPDY] Do not advertise SPDY/2 by default

net/socket/ssl_client_socket.cc

Index: net/socket/ssl_client_socket.cc
diff --git a/net/socket/ssl_client_socket.cc b/net/socket/ssl_client_socket.cc
index 97a21d1bc7edcf1d735068ab4653fe41a9618659..b4fc306b39b7faafb09cbc9339d5786ded8c7650 100644
--- a/net/socket/ssl_client_socket.cc
+++ b/net/socket/ssl_client_socket.cc
@@ -21,7 +21,7 @@ NextProto SSLClientSocket::NextProtoFromString(
   if (proto_string == "http1.1" || proto_string == "http/1.1") {
     return kProtoHTTP11;
   } else if (proto_string == "spdy/2") {
-    return kProtoSPDY2;
+    return kProtoDeprecatedSPDY2;
   } else if (proto_string == "spdy/3") {
     return kProtoSPDY3;
   } else if (proto_string == "spdy/3.1") {
@@ -42,7 +42,7 @@ const char* SSLClientSocket::NextProtoToString(NextProto next_proto) {
   switch (next_proto) {
     case kProtoHTTP11:
       return "http/1.1";
-    case kProtoSPDY2:
+    case kProtoDeprecatedSPDY2:
       return "spdy/2";
     case kProtoSPDY3:
       return "spdy/3";