https://bugs.webkit.org/show_bug.cgi?id=125587

Reviewed by Chris Fleizach.

Source/WebCore:

Exposed accessibility objects with article role with the proper
AtkRole, to be provided by the next stable release of ATK.

* accessibility/atk/WebKitAccessibleWrapperAtk.cpp:
(atkRole):

Tools:

Add mappings to DRT & WKTR for article roles.

* DumpRenderTree/atk/AccessibilityUIElementAtk.cpp:
* WebKitTestRunner/InjectedBundle/atk/AccessibilityUIElementAtk.cpp:

LayoutTests:

Update test to unskip article objects and update expectations.

* accessibility/aria-mappings-expected.txt:
* platform/gtk/accessibility/roles-exposed-expected.txt:
* platform/gtk/accessibility/roles-exposed.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160637 268f45cc-cd09-0410-ab3c-d52691b4dbfc