AllowBroadcast() is exposed to NaCl.

ppapi/shared_impl/private/udp_socket_private_impl.cc

Index: ppapi/shared_impl/private/udp_socket_private_impl.cc
diff --git a/ppapi/shared_impl/private/udp_socket_private_impl.cc b/ppapi/shared_impl/private/udp_socket_private_impl.cc
index 9b509e1f307cf8daf413908e531a4a7b27012ce3..a529137f16969a1d6eb3f7bf0c23223096a5aa0c 100644
--- a/ppapi/shared_impl/private/udp_socket_private_impl.cc
+++ b/ppapi/shared_impl/private/udp_socket_private_impl.cc
@@ -40,6 +40,16 @@ UDPSocketPrivateImpl::AsPPB_UDPSocket_Private_API() {
   return this;
 }
 
+int32_t UDPSocketPrivateImpl::SetSocketFeature(PP_UDPSocketFeature_Private name,
+                                               PP_Var value) {
+  if (bound_ || closed_)
+    return PP_ERROR_FAILED;
+
+  // Send the request, no response needed.
+  SendSetSocketFeature(name, value);

[brettw, 2012/08/22 22:45:21]

If you want to keep this function returning int32_t, I think this Send function
should also return the int32_t, and it should return PP_ERROR_BADARGUMENT if you
supply an invalid enum, rather than asserting.

[ygorshenin1, 2012/08/23 09:48:40]

Done.

+  return PP_OK;
+}
+
 int32_t UDPSocketPrivateImpl::Bind(const PP_NetAddress_Private* addr,
                                    scoped_refptr<TrackedCallback> callback) {
   if (!addr)