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

remoting/protocol/pepper_transport_socket_adapter.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 "remoting/protocol/pepper_transport_socket_adapter.h"
 
 #include "base/logging.h"
 #include "net/base/address_list.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ skipping 201 matching lines @@
   NOTIMPLEMENTED();
   return 0;
 }
 
 base::TimeDelta PepperTransportSocketAdapter::GetConnectTimeMicros() const {
   DCHECK(CalledOnValidThread());
   NOTIMPLEMENTED();
   return base::TimeDelta();
 }
 
+net::NextProto PepperTransportSocketAdapter::GetNegotiatedProtocol() const {
+  DCHECK(CalledOnValidThread());
+  NOTIMPLEMENTED();
+  return net::kProtoUnknown;
+}
 
 int PepperTransportSocketAdapter::ProcessCandidates() {
   DCHECK(CalledOnValidThread());
   DCHECK(!get_address_pending_);
   DCHECK(transport_.get());
 
   while (true) {
     pp::Var address;
     int result = transport_->GetNextAddress(
         &address, callback_factory_.NewOptionalCallback(
@@ skipping 49 matching lines @@
   DCHECK(write_buffer_);
 
   net::CompletionCallback callback = write_callback_;
   write_callback_.Reset();
   write_buffer_ = NULL;
   callback.Run(PPErrorToNetError(result));
 }
 
 }  // namespace protocol
 }  // namespace remoting