GitLab

PaintLayer does one fragmentainer at a time, but we were painting and
hit-testing everything in each iteration, leading to DCHECK failures
(duplicate paint entries) for painting, and false hit-test matches.

Bug: 829028
Change-Id: Iededd014d84b4db9c29e4df6332033b0138da42b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2490111Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821117}