Revert "[Blink] Invalidate clip path cache if mask layer is mutated"

This reverts commit 3c0ef7a52f1d5507732239edfebd81d090d1e027.

Reason for revert: It didn't fix the target crash.

Original change's description:
> [Blink] Invalidate clip path cache if mask layer is mutated
> 
> This is a speculative fix for https://crbug.com/856818 .
> 
> It is speculated that the clip path of an element become valid without
> invalidating its cache, resulting in the associated clip nodes not
> being created, and the newly created mask layer having bad layer state.
> 
> BUG=856818
> 
> Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: Iab7acc4eb8007d03b259e6dab4f036e2b11bd900
> Reviewed-on: https://chromium-review.googlesource.com/1130596
> Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
> Commit-Queue: Tien-Ren Chen <trchen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#574425}

TBR=trchen@chromium.org,chrishtr@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 856818
Change-Id: Ib4f9d6920caa36ac31b4e1825adc926fa9c9064f
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1140456
Reviewed-by: Tien-Ren Chen <trchen@chromium.org>
Commit-Queue: Tien-Ren Chen <trchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575812}
1 file changed