The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a558107e39ada9bc73bd1227e75d741c4636c7de

commit a558107e39ada9bc73bd1227e75d741c4636c7de
Author: Aleks Totic <atotic@chromium.org>
Date: Tue Jun 05 20:07:11 2018

[LayoutNG] Fix flex BODY in quirks mode

We were not updating margins correctly inside NGBlockNode::RunOldLayout.
Symptom was that BODY(flex) block size was too big when HTML had margins
inside quirks mode.

Another side effect of this fix is two crashes have gone away.

Added explicit test case for BODY(flex) in quirks mode.

Bug: 849490
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: Id0ce0910144c81fc254646110424f36c898f9ebd
Reviewed-on: https://chromium-review.googlesource.com/1086381
Commit-Queue: Aleks Totic <atotic@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564629}
[modify] https://crrev.com/a558107e39ada9bc73bd1227e75d741c4636c7de/third_party/WebKit/LayoutTests/TestExpectations
[add] https://crrev.com/a558107e39ada9bc73bd1227e75d741c4636c7de/third_party/WebKit/LayoutTests/external/wpt/css/css-flexbox/flexbox_quirks_body.html
[add] https://crrev.com/a558107e39ada9bc73bd1227e75d741c4636c7de/third_party/WebKit/LayoutTests/external/wpt/css/css-flexbox/reference/flexbox_quirks_body-ref.html
[modify] https://crrev.com/a558107e39ada9bc73bd1227e75d741c4636c7de/third_party/blink/renderer/core/layout/ng/ng_block_node.cc