commit 545de80a86c0f1b94c0e354c0bf2c09b91fe69af
author Tien-Ren Chen <trchen@chromium.org> Sat Sep 15 14:25:04 2018
committer Commit Bot <commit-bot@chromium.org> Sat Sep 15 14:25:04 2018
tree 5c706e44e4df2d84704f6be3d231b6b69d8f0d1c
parent 4a19ae010b1c420cb3650a29a72a5ef6ac93f627

[Blink/SPv175+] Change DCHECK(chunk clip escaped layer clip) to a DLOG

This is a scaled-back version of a same-named previous CL. This version
only converts the DCHECK into a DLOG, but keep the not-so-robust error
recovery algorithm as-is.

The PaintChunkToCcLayer algorithm was originally designed for
SPv2 compositor, and it was expected the layerization algorithm should
never assign a chunk to a excessively clipped layer, thus the DCHECK.

Later this algorithm was adopted in SPv175 to be used with the
SPv1 compositor. There is a known bug that in certain corner case we
can fail to escape clip, and the bug is difficult to fix in the
legacy architecture. The DCHECK is expected to be a "soft" one that
we have a fail-safe path to recover in a sane way.

BUG=881788,853357

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ic534ea754ac392e839534e3bfbeb1fbccc64d120
Reviewed-on: https://chromium-review.googlesource.com/1227062
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591587}