https://chromium-review.googlesource.com/c/chromium/src/+/666681

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/05ad40ab431fd9ebd2b95c5f059eff5e629361fe

commit 05ad40ab431fd9ebd2b95c5f059eff5e629361fe
Author: Rune Lillesveen <rune@opera.com>
Date: Fri Sep 15 08:19:08 2017

Rebuild non-distributed children with separate WhitespaceAttacher.

We used to pass in the same WhitespaceAttacher to the pass over non-
distributed child nodes which caused DidVisitText() to mess up the
whitespace re-attachment of whitespace being the left-most node of the
distributed nodes. In particular if there was a ::before element
changing display type preceding that left-most space.

Instead, make a RebuildNonDistributedChildren() method which passes in
a separate WhitespaceAttacher.

Bug:  765090 
Change-Id: I4fd3bd417d7a5d7accdcb8b6155991093ab05f50
Reviewed-on: https://chromium-review.googlesource.com/666681
Reviewed-by: nainar <nainar@chromium.org>
Reviewed-by: meade_UTC10 <meade@chromium.org>
Commit-Queue: Rune Lillesveen <rune@opera.com>
Cr-Commit-Position: refs/heads/master@{#502202}
[add] https://crrev.com/05ad40ab431fd9ebd2b95c5f059eff5e629361fe/third_party/WebKit/LayoutTests/fast/text/whitespace/reattach-before-pseudo-nondistributed-whitespace-expected.html
[add] https://crrev.com/05ad40ab431fd9ebd2b95c5f059eff5e629361fe/third_party/WebKit/LayoutTests/fast/text/whitespace/reattach-before-pseudo-nondistributed-whitespace.html
[modify] https://crrev.com/05ad40ab431fd9ebd2b95c5f059eff5e629361fe/third_party/WebKit/Source/core/dom/ContainerNode.cpp
[modify] https://crrev.com/05ad40ab431fd9ebd2b95c5f059eff5e629361fe/third_party/WebKit/Source/core/dom/ContainerNode.h
[modify] https://crrev.com/05ad40ab431fd9ebd2b95c5f059eff5e629361fe/third_party/WebKit/Source/core/dom/Element.cpp