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

net/socket/tcp_client_socket.cc

 // Copyright (c) 2013 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/tcp_client_socket.h"
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
@@ skipping 251 matching lines @@
   // |socket_| is gone. Therefore, it is safe to use base::Unretained() here.
   CompletionCallback write_callback = base::Bind(
       &TCPClientSocket::DidCompleteReadWrite, base::Unretained(this), callback);
   int result = socket_->Write(buf, buf_len, write_callback);
   if (result > 0)
     use_history_.set_was_used_to_convey_data();
 
   return result;
 }
 
-bool TCPClientSocket::SetReceiveBufferSize(int32 size) {
+int TCPClientSocket::SetReceiveBufferSize(int32 size) {
   return socket_->SetReceiveBufferSize(size);
 }
 
-bool TCPClientSocket::SetSendBufferSize(int32 size) {
+int TCPClientSocket::SetSendBufferSize(int32 size) {
     return socket_->SetSendBufferSize(size);
 }
 
 bool TCPClientSocket::SetKeepAlive(bool enable, int delay) {
   return socket_->SetKeepAlive(enable, delay);
 }
 
 bool TCPClientSocket::SetNoDelay(bool no_delay) {
   return socket_->SetNoDelay(no_delay);
 }
@@ skipping 24 matching lines @@
   int result = socket_->Open(family);
   if (result != OK)
     return result;
 
   socket_->SetDefaultOptionsForClient();
 
   return OK;
 }
 
 }  // namespace net