Add a new GetNegotiatedProtocol method to StreamSocket and implement in all subclasses.

jingle/notifier/base/proxy_resolving_client_socket.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "jingle/notifier/base/proxy_resolving_client_socket.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
@@ skipping 348 matching lines @@
   return -1;
 }
 
 base::TimeDelta ProxyResolvingClientSocket::GetConnectTimeMicros() const {
   if (transport_.get() && transport_->socket())
     return transport_->socket()->GetConnectTimeMicros();
   NOTREACHED();
   return base::TimeDelta::FromMicroseconds(-1);
 }
 
+net::NextProto ProxyResolvingClientSocket::GetNegotiatedProtocol() const {
+  if (transport_.get() && transport_->socket())
+    return transport_->socket()->GetNegotiatedProtocol();
+  NOTREACHED();
+  return net::kProtoUnknown;
+}
+
 void ProxyResolvingClientSocket::CloseTransportSocket() {
   if (transport_.get() && transport_->socket())
     transport_->socket()->Disconnect();
   transport_.reset();
 }
 
 }  // namespace notifier