EVENTS_BASE_EXPORT extern const char kTouchEventsAuto[];
EVENTS_BASE_EXPORT extern const char kTouchEventsEnabled[];
EVENTS_BASE_EXPORT extern const char kTouchEventsDisabled[];
-EVENTS_BASE_EXPORT extern const char kUnifiedGestureDetector[];
-EVENTS_BASE_EXPORT extern const char kUnifiedGestureDetectorAuto[];
-EVENTS_BASE_EXPORT extern const char kUnifiedGestureDetectorEnabled[];
-EVENTS_BASE_EXPORT extern const char kUnifiedGestureDetectorDisabled[];
EVENTS_BASE_EXPORT extern const char kCompensateForUnstablePinchZoom[];
#if defined(OS_LINUX)