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..d3e94c1a48391352a3c5696ba18e3e9b953fbd08 100644
--- a/ppapi/shared_impl/private/udp_socket_private_impl.cc
+++ b/ppapi/shared_impl/private/udp_socket_private_impl.cc
@@ -12,6 +12,7 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
+#include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 
@@ -40,6 +41,25 @@ 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;
+
+  switch (name) {
+    case PP_UDPSOCKETFEATURE_ADDRESS_REUSE:
+    case PP_UDPSOCKETFEATURE_BROADCAST:
+      if (value.type != PP_VARTYPE_BOOL)
+        return PP_ERROR_BADARGUMENT;
+      SendBoolSocketFeature(static_cast<int32_t>(name),
+                            PP_ToBool(value.value.as_bool));
+      break;
+    default:
+      return PP_ERROR_BADARGUMENT;
+  }
+  return PP_OK;
+}
+
 int32_t UDPSocketPrivateImpl::Bind(const PP_NetAddress_Private* addr,
                                    scoped_refptr<TrackedCallback> callback) {
   if (!addr)