Revert of Revert of Early terminate flings when scrolling impossible

content/child/touch_fling_gesture_curve.cc

Index: content/child/touch_fling_gesture_curve.cc
diff --git a/content/child/touch_fling_gesture_curve.cc b/content/child/touch_fling_gesture_curve.cc
index 43cbd5ba7e607d8702ea5b5c68f628ec296b5600..a05292f8025e1c770398f1f26ae5a95a078ae2a9 100644
--- a/content/child/touch_fling_gesture_curve.cc
+++ b/content/child/touch_fling_gesture_curve.cc
@@ -150,11 +150,9 @@
 
   if (time + time_offset_ < curve_duration_ ||
       scroll_increment != WebFloatSize()) {
-    target->notifyCurrentFlingVelocity(scroll_velocity);
     // scrollBy() could delete this curve if the animation is over, so don't
     // touch any member variables after making that call.
-    target->scrollBy(scroll_increment);
-    return true;
+    return target->scrollBy(scroll_increment, scroll_velocity);
   }
 
   return false;