A number of css3/scroll-snap DRT tests fail.
These tests were introduced during 8u112 Webkit merge, and are not present in older DRT workspace.
Some of the tests have no expected files; other tests fail.
Tests fail with 8u102, 8u112 and 9.

Tests list:
css3/scroll-snap/nested-elements.html
css3/scroll-snap/scroll-snap-coordinate-mainframe.html
css3/scroll-snap/scroll-snap-coordinate-overflow-resize.html
css3/scroll-snap/scroll-snap-coordinate.html
css3/scroll-snap/scroll-snap-desination-lock-up.html
css3/scroll-snap/scroll-snap-iframe.html
css3/scroll-snap/scroll-snap-inherit.html
css3/scroll-snap/scroll-snap-initial.html
css3/scroll-snap/scroll-snap-mismatch.html
css3/scroll-snap/scroll-snap-offsets.html
css3/scroll-snap/scroll-snap-position-values.html
css3/scroll-snap/scroll-snap-property-computed-style.html
css3/scroll-snap/scroll-snap-property-parsing.html
css3/scroll-snap/scroll-snap-subpixel-repeat.html