VisitLoopChoice  1486 src/jsregexp.cc   visitor->VisitLoopChoice(this);
VisitLoopChoice  1498 src/jsregexp.h   virtual void VisitLoopChoice(LoopChoiceNode* that) { VisitChoice(that); }
VisitLoopChoice  1561 src/jsregexp.h   virtual void VisitLoopChoice(LoopChoiceNode* that);