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

ppapi/shared_impl/private/tcp_socket_private_impl.cc

Index: ppapi/shared_impl/private/tcp_socket_private_impl.cc
diff --git a/ppapi/shared_impl/private/tcp_socket_private_impl.cc b/ppapi/shared_impl/private/tcp_socket_private_impl.cc
index ce8f03a892b7d963f71259e58c080f49f5cd7225..56a3585bd9d644062e005446dedfe37b7d141c3a 100644
--- a/ppapi/shared_impl/private/tcp_socket_private_impl.cc
+++ b/ppapi/shared_impl/private/tcp_socket_private_impl.cc
@@ -89,9 +89,9 @@ int32_t TCPSocketPrivateImpl::SetOption(
     const PP_Var& value,
     scoped_refptr<TrackedCallback> callback) {
   switch (name) {
-    case PP_TCPSOCKETOPTION_INVALID:
+    case PP_TCPSOCKETOPTION_PRIVATE_INVALID:
       return PP_ERROR_BADARGUMENT;
-    case PP_TCPSOCKETOPTION_NO_DELAY:
+    case PP_TCPSOCKETOPTION_PRIVATE_NO_DELAY:
       return SetOptionImpl(PP_TCPSOCKET_OPTION_NO_DELAY, value, callback);
     default:
       NOTREACHED();