commit f5099b7b47d627181b682a832d0e80f775d20eae
author cathiechen <cathiechen@tencent.com> Thu Nov 02 20:35:35 2017
committer Commit Bot <commit-bot@chromium.org> Thu Nov 02 20:35:35 2017
tree a19b4649778d5a255af7b5cf5f42dddac3324219
parent 48e94b01b98d71ee312bfedbbdc94440493eac28

Fix unnecessary line-break between marker and overflow element.

In order to show marker in list with overflow children, we make marker as
the child of list. This change will generate line-break between marker
and overflow children. To eliminame this line-break:
1. When construct layout tree add marker as child of li which would
generate line-break.
2. To eliminame line-break, set marker_container's logicalHeight to
0px.
3. Align marker's block direction position according to first-line-box
after li's children layouted.

Design document:
https://docs.google.com/document/d/1bMerTLCSqHZYAERJ2HDr-4auOSw0eIx8QfD2vY92TNo

Bug: 775880, 767408, 344941
Change-Id: I323be3fdd9447c5487963cb039c7bcc83922dcb8
Reviewed-on: https://chromium-review.googlesource.com/735303
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513595}