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

net/socket/ssl_client_socket_nss.cc

Index: net/socket/ssl_client_socket_nss.cc
diff --git a/net/socket/ssl_client_socket_nss.cc b/net/socket/ssl_client_socket_nss.cc
index b3c8e0ee7b97bd2d3abdc6e6aa1aec33906cdcb8..3bb076fa222a112641906bc073919524b20e2c26 100644
--- a/net/socket/ssl_client_socket_nss.cc
+++ b/net/socket/ssl_client_socket_nss.cc
@@ -3084,11 +3084,11 @@ int SSLClientSocketNSS::Write(IOBuffer* buf, int buf_len,
   return rv;
 }
 
-bool SSLClientSocketNSS::SetReceiveBufferSize(int32 size) {
+int SSLClientSocketNSS::SetReceiveBufferSize(int32 size) {
   return transport_->socket()->SetReceiveBufferSize(size);
 }
 
-bool SSLClientSocketNSS::SetSendBufferSize(int32 size) {
+int SSLClientSocketNSS::SetSendBufferSize(int32 size) {
   return transport_->socket()->SetSendBufferSize(size);
 }