message: Tweaked for consistency
  Given up matching to the android ScrollView code
diff: @@ -69,8 +69,8 @@ public class CoordinatorLayoutView extends CoordinatorLayout {
  case MotionEvent.ACTION_MOVE:
  int activePointerIndex = ev.findPointerIndex(activePointerId);
  int y = (int) ev.getY(activePointerIndex);
  - int yDiff = Math.abs(y - lastMotionY);
  - if (yDiff > touchSlop)
  + int deltaY = lastMotionY - y;
  + if (Math.abs(deltaY) > touchSlop)
  dragging = true;
  break;
  }
  