isBeforeUnloadEvent  148 Source/bindings/v8/V8AbstractEventListener.cpp     if (m_isAttribute && !returnValue->IsNull() && !returnValue->IsUndefined() && event->isBeforeUnloadEvent()) {
isBeforeUnloadEvent   41 Source/core/events/BeforeUnloadEvent.h     virtual bool isBeforeUnloadEvent() const OVERRIDE;
isBeforeUnloadEvent  155 Source/core/events/Event.h     virtual bool isBeforeUnloadEvent() const;