[LayoutNG] LayoutInline::DirtyLinesFromChangedChild()

This patch makes |LayoutInline::DirtyLinesFromChangedChild()| to work with
LayoutNG by marking layout dirty for |LayoutInline| node instead of marking
|InlineBox| for specified child node because LayoutNG doesn't support
partial dirtiness of box fragment yet.

Bug: 591099
Change-Id: I1f0b616f1fed891e072a84df74a66fe324c85df2
Reviewed-on: https://chromium-review.googlesource.com/768257
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516998}
2 files changed