https://bugs.webkit.org/show_bug.cgi?id=117761.

Reviewed by Anders Carlsson.

accessibility/press-works-on-control-types.html

* accessibility/win/AXObjectCacheWin.cpp:
(WebCore::AXObjectCache::postPlatformNotification): Add handlers for more event notifications.
* accessibility/win/AccessibilityObjectWrapperWin.cpp:
(WebCore::AccessibilityObjectWrapper::accessibilityAttributeValue): Protect against null
pointer dereference found during testing.
* dom/Document.cpp:
(WebCore::Document::implicitClose): Execute notification handler for Windows as well as Mac.
* page/FrameView.cpp:
(WebCore::FrameView::layout): Ditto.

../WebKit/win: [Windows] AX: Extend notification support.
https://bugs.webkit.org/show_bug.cgi?id=117761

Reviewed by Anders Carlsson.

* AccessibleDocument.cpp:
(AccessibleDocument::state): Improve handling of focus state.
* AccessibleDocument.h: Provide signature for new state override.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@151745 268f45cc-cd09-0410-ab3c-d52691b4dbfc