Remove Chromium code from WebCore/accessibility
https://bugs.webkit.org/show_bug.cgi?id=114001

Reviewed by Benjamin Poulain.

Removed.

* accessibility/AccessibilityObject.cpp:
(WebCore::AccessibilityObject::AccessibilityObject):
(WebCore::AccessibilityObject::detach):
(WebCore::AccessibilityObject::isDetached):
* accessibility/AccessibilityObject.h:
(AccessibilityObject):
* accessibility/chromium: Removed.
* accessibility/chromium/AXObjectCacheChromium.cpp: Removed.
* accessibility/chromium/AccessibilityObjectChromium.cpp: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147716 268f45cc-cd09-0410-ab3c-d52691b4dbfc