AddUtf16Symbol   1218 src/preparser.cc     old_type = finder->AddUtf16Symbol(scanner_->literal_utf16_string(), type);
AddUtf16Symbol   1391 src/preparser.cc           duplicate_finder.AddUtf16Symbol(scanner_->literal_utf16_string(), 1);
AddUtf16Symbol     68 src/preparser.h   int AddUtf16Symbol(i::Vector<const uint16_t> key, int value);