LookupCounter     983 src/d8.cc        V8::SetCounterFunction(LookupCounter);
LookupCounter    1215 src/d8.cc          V8::SetCounterFunction(LookupCounter);
LookupCounter     283 src/d8.h         static int* LookupCounter(const char* name);
LookupCounter    16580 test/cctest/test-api.cc   V8::SetCounterFunction(LookupCounter);