Expose native, desktop and mobile gesture detection defaults

ui/events/gesture_detection/filtered_gesture_provider.h

Index: ui/events/gesture_detection/filtered_gesture_provider.h
diff --git a/ui/events/gesture_detection/filtered_gesture_provider.h b/ui/events/gesture_detection/filtered_gesture_provider.h
index 231e62bf7fa21a444109ce209b596e86bac4ebc5..55cc35e8cf0032e9c3fa623e5becac002fb9786d 100644
--- a/ui/events/gesture_detection/filtered_gesture_provider.h
+++ b/ui/events/gesture_detection/filtered_gesture_provider.h
@@ -37,6 +37,7 @@ class GESTURE_DETECTION_EXPORT FilteredGestureProvider
   void SetDoubleTapSupportForPlatformEnabled(bool enabled);
   void SetDoubleTapSupportForPageEnabled(bool enabled);
   const ui::MotionEvent* GetCurrentDownEvent() const;
+  bool LastTouchEventDidGenerateScroll() const;
 
  private:
   // GestureProviderClient implementation.
@@ -51,6 +52,7 @@ class GESTURE_DETECTION_EXPORT FilteredGestureProvider
   ui::TouchDispositionGestureFilter gesture_filter_;
 
   bool handling_event_;
+  bool last_touch_event_did_generate_scroll_;
   ui::GestureEventDataPacket pending_gesture_packet_;
 
   DISALLOW_COPY_AND_ASSIGN(FilteredGestureProvider);