TestSampler       255 test/cctest/test-log.cc   explicit TestSampler(v8::internal::Isolate* isolate)
TestSampler       284 test/cctest/test-log.cc   TestSampler* sampler = NULL;
TestSampler       287 test/cctest/test-log.cc     sampler = new TestSampler(v8::internal::Isolate::Current());