Consolidate and run ARIA-list-and-listitem accessibility test
https://bugs.webkit.org/show_bug.cgi?id=107283

Patch by Brian Holt <brian.holt@samsung.com> on 2013-01-21
Reviewed by Chris Fleizach.

After revision r131674 for bug 99640, the output from
AccessibilityUIElement::role() is consistent across most platforms,
therefore platform specific expections can be consolidated into a
generic expectation with a Mac exception and enabled.

* accessibility/aria-list-and-listitem-expected.txt: Renamed from LayoutTests/platform/chromium/accessibility/aria-list-and-listitem-expected.txt.
* platform/gtk/TestExpectations: Removed passing test.
* platform/gtk/accessibility/aria-list-and-listitem-expected.txt: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140343 268f45cc-cd09-0410-ab3c-d52691b4dbfc