make SetReceiveBufferSize and SetSendBufferSize return net error codes (instead of bools)

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/message_loop.h"
 #include "net/base/io_buffer.h"
@@ skipping 41 matching lines @@
   if (!callback_pending_) {
     base::MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(&BufferedWriteStreamSocket::DoDelayedWrite,
                    weak_factory_.GetWeakPtr()));
     callback_pending_ = true;
   }
   return buf_len;
 }
 
-bool BufferedWriteStreamSocket::SetReceiveBufferSize(int32 size) {
+int BufferedWriteStreamSocket::SetReceiveBufferSize(int32 size) {
   return wrapped_socket_->SetReceiveBufferSize(size);
 }
 
-bool BufferedWriteStreamSocket::SetSendBufferSize(int32 size) {
+int BufferedWriteStreamSocket::SetSendBufferSize(int32 size) {
   return wrapped_socket_->SetSendBufferSize(size);
 }
 
 int BufferedWriteStreamSocket::Connect(const CompletionCallback& callback) {
   return wrapped_socket_->Connect(callback);
 }
 
 void BufferedWriteStreamSocket::Disconnect() {
   wrapped_socket_->Disconnect();
 }
@@ skipping 75 matching lines @@
     io_buffer_->set_offset(io_buffer_->offset() + result);
     if (io_buffer_->RemainingCapacity()) {
       DoDelayedWrite();
     } else {
       io_buffer_->SetCapacity(0);
     }
   }
 }
 
 }  // namespace net