OnDown            255 ui/events/gesture_detection/gesture_detector.cc       handled |= listener_->OnDown(ev);
OnDown             38 ui/events/gesture_detection/gesture_detector.h     virtual bool OnDown(const MotionEvent& e) = 0;
OnDown             64 ui/events/gesture_detection/gesture_detector.h     virtual bool OnDown(const MotionEvent& e) OVERRIDE;