kIsWord          2980 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsNonWord : kIsWord);
kIsWord          2984 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsWord : kIsNonWord);
kIsWord          2987 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsWord : kIsNonWord);
kIsWord          2990 src/jsregexp.cc     BacktrackIfPrevious(compiler, trace, at_boundary ? kIsNonWord : kIsWord);