https://bugs.webkit.org/show_bug.cgi?id=125783

Reviewed by Mario Sanchez Prada.

Source/WebCore: 

When an object with a role=menu is removed, we need to send out a notification informing that the menu has closed.
This means detecting the right kind of destruction event for an element, because we do not want to 
send this notification when the entire cache is being torn down.

Test: platform/mac/accessibility/aria-menu-closed-notification.html

* accessibility/AXObjectCache.cpp:
(WebCore::AXObjectCache::~AXObjectCache):
(WebCore::AXObjectCache::remove):
* accessibility/AXObjectCache.h:
(WebCore::AXObjectCache::document):
* accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::detach):
* accessibility/AccessibilityNodeObject.h:
* accessibility/AccessibilityObject.cpp:
(WebCore::AccessibilityObject::detach):
* accessibility/AccessibilityObject.h:
* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::detach):
* accessibility/AccessibilityRenderObject.h:
* accessibility/AccessibilityScrollView.cpp:
(WebCore::AccessibilityScrollView::detach):
* accessibility/AccessibilityScrollView.h:
* accessibility/mac/AXObjectCacheMac.mm:
(WebCore::AXObjectCache::postPlatformNotification):

LayoutTests: 

* platform/mac/accessibility/aria-menu-closed-notification-expected.txt: Added.
* platform/mac/accessibility/aria-menu-closed-notification.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160778 268f45cc-cd09-0410-ab3c-d52691b4dbfc