isNullEvent        90 Source/modules/device_orientation/DeviceMotionController.cpp bool DeviceMotionController::isNullEvent(Event* event)
isNullEvent        97 Source/modules/device_orientation/DeviceOrientationController.cpp bool DeviceOrientationController::isNullEvent(Event* event)
isNullEvent       207 Source/modules/gamepad/NavigatorGamepad.cpp bool NavigatorGamepad::isNullEvent(Event*)