commit ea0ed30f2e414844d319851ccc332c3f70d25b2a
author Koji Ishii <kojii@chromium.org> Mon Jul 23 22:39:00 2018
committer Commit Bot <commit-bot@chromium.org> Mon Jul 23 22:39:00 2018
tree 1d12a990981a8420bb3ce77d7c01bed549617895
parent 028b3b681d9c76397ed422f6b37ade8b0abb3353

[LayoutNG] Support the '-webkit-box-decoration-break' property

This patch supports the rendering of the
'-webkit-box-decoration-break' property. This property is
used by 0.73% of pages according to UMA.

Also cleanup how NGLineBreaker commmunicates margins/borders/
padding to NGInlineLayoutAlgorithm through NGInlineItemResult.

The work for line breaker to take this property into account
is deferred to future work. Gecko (unprefixed) supports it,
while Blink and WebKit (prefixed) takes only the start edge
into account, ignoring the end edge. Edge does not support
this property yet. Also CSS WG resolved a change in its
behavior recently when used in bidi context. It will need a
bit more investigations.

Bug: 636993
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I8d87db5cd35441133a73fcead67901763026155d
Reviewed-on: https://chromium-review.googlesource.com/1146125
Reviewed-by: Emil A Eklund <eae@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577306}