Unreviewed, rolling out r105885.

Unreviewed, rolling out r105885.
http://trac.webkit.org/changeset/105885
https://bugs.webkit.org/show_bug.cgi?id=77027

Causes assertions in Position. (Requested by leviw|gardening
on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2012-01-25

Source/WebCore:

* dom/Position.cpp:
(WebCore::Position::upstream):
(WebCore::Position::downstream):
* dom/PositionIterator.cpp:
* dom/PositionIterator.h:
(PositionIterator):
* editing/htmlediting.cpp:
(WebCore::nextCandidate):
(WebCore::nextVisuallyDistinctCandidate):
(WebCore::previousCandidate):
(WebCore::previousVisuallyDistinctCandidate):

LayoutTests:

* perf/selection-skip-hidden-node-expected.txt: Removed.
* perf/selection-skip-hidden-node.html: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105902 268f45cc-cd09-0410-ab3c-d52691b4dbfc