Auto-rebaseline for r162504

http://src.chromium.org/viewvc/blink?view=revision&revision=162504

BUG=258896
TBR=steveblock@chromium.org

Review URL: https://codereview.chromium.org/86873003

git-svn-id: svn://svn.chromium.org/blink/trunk@162652 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Avoid n^2 reattach of whitespace siblings when there are many display: none elements

Keep track of the nextTextSibling while doing a recalcStyle to avoid n^2 when appending
lots of display: none elements to a parent that's visible.

This isn't as effective as the WhitespaceChildList was since you could have a whitespace
node and then a thousand divs and then another whitespace and this will want to skip all
those divs looking for the next whitespace, but that situation is probably rare compared
to infinite scroll apps that append lots of siblings that are display: none to preload
content into the DOM.

BUG=323176,322619

Review URL: https://codereview.chromium.org/69933013

git-svn-id: svn://svn.chromium.org/blink/trunk@162653 bbb929c8-8fbe-4397-9dbb-9b2b20218538