https://bugs.webkit.org/show_bug.cgi?id=32126

Reviewed by Beth Dakin.

WebCore: 

Test: accessibility/aria-scrollbar-role.html

* accessibility/AccessibilityObject.cpp:
(WebCore::createARIARoleMap):
* accessibility/AccessibilityObject.h:
(WebCore::AccessibilityObject::isScrollbar):
* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::valueForRange):
(WebCore::AccessibilityRenderObject::orientation):
(WebCore::AccessibilityRenderObject::canHaveChildren):
* accessibility/AccessibilityRenderObject.h:
* accessibility/mac/AccessibilityObjectWrapper.mm:
(-[AccessibilityObjectWrapper additionalAccessibilityAttributeNames]):
(-[AccessibilityObjectWrapper accessibilityAttributeValue:]):
* html/HTMLAttributeNames.in:

WebKitTools: 

* DumpRenderTree/AccessibilityUIElement.cpp:
(getOrientationCallback):
(AccessibilityUIElement::getJSClass):
* DumpRenderTree/AccessibilityUIElement.h:
* DumpRenderTree/gtk/AccessibilityUIElementGtk.cpp:
(AccessibilityUIElement::orientation):
* DumpRenderTree/mac/AccessibilityUIElementMac.mm:
(AccessibilityUIElement::orientation):
* DumpRenderTree/win/AccessibilityUIElementWin.cpp:
(AccessibilityUIElement::orientation):

LayoutTests: 

* accessibility/aria-scrollbar-role-expected.txt: Added.
* accessibility/aria-scrollbar-role.html: Added.
* platform/gtk/Skipped:
* platform/win/Skipped:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@51669 268f45cc-cd09-0410-ab3c-d52691b4dbfc