SPDY - add support for spdy/2.1 to support flow control.

net/socket/ssl_client_socket.cc

Index: net/socket/ssl_client_socket.cc
===================================================================
--- net/socket/ssl_client_socket.cc	(revision 113884)
+++ net/socket/ssl_client_socket.cc	(working copy)
@@ -22,6 +22,8 @@
     return kProtoSPDY1;
   } else if (proto_string == "spdy/2") {
     return kProtoSPDY2;
+  } else if (proto_string == "spdy/2.1") {
+    return kProtoSPDY21;
   } else {
     return kProtoUnknown;
   }
@@ -91,6 +93,15 @@
   return was_spdy_negotiated_ = negotiated;
 }
 
+SSLClientSocket::NextProto SSLClientSocket::next_protocol_negotiated() const {
+  return next_protocol_;
+}
+
+void SSLClientSocket::set_next_protocol_negotiated(
+    SSLClientSocket::NextProto next_protocol) {
+  next_protocol_ = next_protocol;
+}
+
 bool SSLClientSocket::was_origin_bound_cert_sent() const {
   return was_origin_bound_cert_sent_;
 }