ensureLiveRoot    299 Source/bindings/v8/V8GCController.cpp         const v8::Persistent<v8::Value>& liveRoot = V8PerIsolateData::from(m_isolate)->ensureLiveRoot();
ensureLiveRoot     71 Source/bindings/v8/V8PerIsolateData.h     v8::Persistent<v8::Value>& ensureLiveRoot();