kIsNonWord       2980 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsNonWord : kIsWord);
kIsNonWord       2984 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsWord : kIsNonWord);
kIsNonWord       2987 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsWord : kIsNonWord);
kIsNonWord       2990 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsNonWord : kIsWord);
kIsNonWord       3005 src/jsregexp.cc   Label* non_word = backtrack_if_previous == kIsNonWord ?
kIsNonWord       3008 src/jsregexp.cc   Label* word = backtrack_if_previous == kIsNonWord ?
kIsNonWord       3020 src/jsregexp.cc   EmitWordCheck(assembler, word, non_word, backtrack_if_previous == kIsNonWord);