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

net/udp/udp_client_socket.cc

 // Copyright (c) 2011 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/udp/udp_client_socket.h"
 
 #include "net/base/net_log.h"
 
 namespace net {
 
@@ skipping 28 matching lines @@
 }
 
 int UDPClientSocket::GetPeerAddress(IPEndPoint* address) const {
   return socket_.GetPeerAddress(address);
 }
 
 int UDPClientSocket::GetLocalAddress(IPEndPoint* address) const {
   return socket_.GetLocalAddress(address);
 }
 
-bool UDPClientSocket::SetReceiveBufferSize(int32 size) {
+int UDPClientSocket::SetReceiveBufferSize(int32 size) {
   return socket_.SetReceiveBufferSize(size);
 }
 
-bool UDPClientSocket::SetSendBufferSize(int32 size) {
+int UDPClientSocket::SetSendBufferSize(int32 size) {
   return socket_.SetSendBufferSize(size);
 }
 
 const BoundNetLog& UDPClientSocket::NetLog() const {
   return socket_.NetLog();
 }
 
 }  // namespace net