Native context: do not put public symbols and flags on the js builtins object.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 151a8ed2b3aa9c85bbaf72678d08aea9721e9785..ab52719fd8ed293df0df459a867a2784e0571695 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -3220,7 +3220,7 @@ void Heap::CreateInitialObjects() {
 
   {
     HandleScope scope(isolate());
-#define SYMBOL_INIT(name, varname, description)                             \
+#define SYMBOL_INIT(name, description)                                      \
   Handle<Symbol> name = factory->NewSymbol();                               \
   Handle<String> name##d = factory->NewStringFromStaticChars(#description); \
   name->set_name(*name##d);                                                 \