Added a Isolate* parameter to Serializer::enabled().

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 3c3b187f7d02b9b497c47b01eca0de1f4aa58efb..59ac419300a9c6a8fa063642755f88a7a0cb6ffd 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -1938,7 +1938,7 @@ void Factory::SetNumberStringCache(Handle<Object> number,
       // cache in the snapshot to keep  boot-time memory usage down.
       // If we expand the number string cache already while creating
       // the snapshot then that didn't work out.
-      ASSERT(!Serializer::enabled() || FLAG_extra_code != NULL);
+      ASSERT(!Serializer::enabled(isolate()) || FLAG_extra_code != NULL);
       Handle<FixedArray> new_cache = NewFixedArray(full_size, TENURED);
       isolate()->heap()->set_number_string_cache(*new_cache);
       return;