Add "PRIVATE" to the enum names of some private Pepper networking APIs:

ppapi/proxy/udp_socket_private_resource.cc

Index: ppapi/proxy/udp_socket_private_resource.cc
diff --git a/ppapi/proxy/udp_socket_private_resource.cc b/ppapi/proxy/udp_socket_private_resource.cc
index ee14bdd9461a2767a5b3e12d6357d43ec9bd3af6..af43c10fb05e281043f35d3b0476553d9072853e 100644
--- a/ppapi/proxy/udp_socket_private_resource.cc
+++ b/ppapi/proxy/udp_socket_private_resource.cc
@@ -29,13 +29,13 @@ int32_t UDPSocketPrivateResource::SetSocketFeature(
     PP_Var value) {
   PP_UDPSocket_Option public_name = PP_UDPSOCKET_OPTION_ADDRESS_REUSE;
   switch (name) {
-    case PP_UDPSOCKETFEATURE_ADDRESS_REUSE:
+    case PP_UDPSOCKETFEATURE_PRIVATE_ADDRESS_REUSE:
       // |public_name| has been initialized above.
       break;
-    case PP_UDPSOCKETFEATURE_BROADCAST:
+    case PP_UDPSOCKETFEATURE_PRIVATE_BROADCAST:
       public_name = PP_UDPSOCKET_OPTION_BROADCAST;
       break;
-    case PP_UDPSOCKETFEATURE_COUNT:
+    case PP_UDPSOCKETFEATURE_PRIVATE_COUNT:
       return PP_ERROR_BADARGUMENT;
     default:
       NOTREACHED();