https://bugs.webkit.org/show_bug.cgi?id=32007

Reviewed by Darin Adler.

WebCore: 

Test: platform/mac/accessibility/aria-drag-drop.html

* accessibility/AccessibilityObject.h:
(WebCore::AccessibilityObject::supportsARIADropping):
(WebCore::AccessibilityObject::supportsARIADragging):
(WebCore::AccessibilityObject::isARIAGrabbed):
(WebCore::AccessibilityObject::setARIAGrabbed):
(WebCore::AccessibilityObject::determineARIADropEffects):
* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::supportsARIADropping):
(WebCore::AccessibilityRenderObject::supportsARIADragging):
(WebCore::AccessibilityRenderObject::isARIAGrabbed):
(WebCore::AccessibilityRenderObject::setARIAGrabbed):
(WebCore::AccessibilityRenderObject::determineARIADropEffects):
* accessibility/AccessibilityRenderObject.h:
* accessibility/mac/AccessibilityObjectWrapper.mm:
(-[AccessibilityObjectWrapper additionalAccessibilityAttributeNames]):
(-[AccessibilityObjectWrapper accessibilityAttributeValue:]):
(-[AccessibilityObjectWrapper accessibilityIsAttributeSettable:]):
(-[AccessibilityObjectWrapper accessibilitySetValue:forAttribute:]):
* html/HTMLAttributeNames.in:

WebKitTools: 

* DumpRenderTree/AccessibilityUIElement.cpp:
(getARIADropEffectsCallback):
(getARIAIsGrabbedCallback):
(AccessibilityUIElement::getJSClass):
* DumpRenderTree/AccessibilityUIElement.h:
* DumpRenderTree/mac/AccessibilityUIElementMac.mm:
(AccessibilityUIElement::ariaIsGrabbed):
(AccessibilityUIElement::ariaDropEffects):

LayoutTests: 

* platform/mac/accessibility/aria-drag-drop-expected.txt: Added.
* platform/mac/accessibility/aria-drag-drop.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@51582 268f45cc-cd09-0410-ab3c-d52691b4dbfc