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

net/socket/buffered_write_stream_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 "net/socket/buffered_write_stream_socket.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop.h"
 #include "net/base/io_buffer.h"
@@ skipping 101 matching lines @@
 }
 
 int64 BufferedWriteStreamSocket::NumBytesRead() const {
   return wrapped_socket_->NumBytesRead();
 }
 
 base::TimeDelta BufferedWriteStreamSocket::GetConnectTimeMicros() const {
   return wrapped_socket_->GetConnectTimeMicros();
 }
 
+NextProto BufferedWriteStreamSocket::GetNegotiatedProtocol() const {
+  return wrapped_socket_->GetNegotiatedProtocol();
+}
+
 void BufferedWriteStreamSocket::DoDelayedWrite() {
   int result = wrapped_socket_->Write(
       io_buffer_, io_buffer_->RemainingCapacity(),
       base::Bind(&BufferedWriteStreamSocket::OnIOComplete,
                  base::Unretained(this)));
   if (result == ERR_IO_PENDING) {
     callback_pending_ = true;
     wrapped_write_in_progress_ = true;
   } else {
     OnIOComplete(result);
@@ skipping 15 matching lines @@
     io_buffer_->set_offset(io_buffer_->offset() + result);
     if (io_buffer_->RemainingCapacity()) {
       DoDelayedWrite();
     } else {
       io_buffer_->SetCapacity(0);
     }
   }
 }
 
 }  // namespace net