This reverts commit 83daa38b.

Reason for revert: The patch potentially caused crbug.com/736248, need further investigation.

Original change's description:
> cc: Enable mask tiling
> 
> Set the cc flag enable_mask_tiling to true. Masks without filters are
> now tiled.
> 
> Bug: 567293, 567296
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: Iaeb8477b1aba550f0eec1afd9ef0cbb27381ccc1
> Reviewed-on: https://chromium-review.googlesource.com/543517
> Commit-Queue: Xianda Sun <sunxd@chromium.org>
> Reviewed-by: Chris harrelson <chrishtr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#481563}

TBR=trchen@chromium.org,chrishtr@chromium.org,enne@chromium.org,sunxd@chromium.org,schenney@chromium.org

Change-Id: I0f83150b90caca0ef2e65e6c886509c06863df47
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 567293, 567296
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/545775Reviewed-by: Xianda Sun <sunxd@chromium.org>
Commit-Queue: Xianda Sun <sunxd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481881}