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

net/socket/ssl_server_socket_nss.cc

Index: net/socket/ssl_server_socket_nss.cc
diff --git a/net/socket/ssl_server_socket_nss.cc b/net/socket/ssl_server_socket_nss.cc
index b95983a51593d75f3289202bbee41521bd5b835c..6abb531603dee36083f88aca4223a0183fe83052 100644
--- a/net/socket/ssl_server_socket_nss.cc
+++ b/net/socket/ssl_server_socket_nss.cc
@@ -238,11 +238,11 @@ int SSLServerSocketNSS::Write(IOBuffer* buf, int buf_len,
   return rv;
 }
 
-bool SSLServerSocketNSS::SetReceiveBufferSize(int32 size) {
+int SSLServerSocketNSS::SetReceiveBufferSize(int32 size) {
   return transport_socket_->SetReceiveBufferSize(size);
 }
 
-bool SSLServerSocketNSS::SetSendBufferSize(int32 size) {
+int SSLServerSocketNSS::SetSendBufferSize(int32 size) {
   return transport_socket_->SetSendBufferSize(size);
 }