EXTERNAL_ASCII_STRING_TYPE 4433 src/heap.cc        case EXTERNAL_ASCII_STRING_TYPE: return external_ascii_symbol_map();
EXTERNAL_ASCII_STRING_TYPE  489 src/objects-printer.cc     case EXTERNAL_ASCII_STRING_TYPE:
EXTERNAL_ASCII_STRING_TYPE  235 src/objects.h    V(EXTERNAL_ASCII_STRING_TYPE)                                                \
EXTERNAL_ASCII_STRING_TYPE  388 src/objects.h    V(EXTERNAL_ASCII_STRING_TYPE,                                                \