<rdar://problem/7397558> REGRESSION: AXImages inside of AXLink cause AXLink to have wrong bounds

Reviewed by Simon Fraser.

WebCore: 

Test: accessibility/dimensions-include-descendants.html

* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::boundingBoxRect): Use absoluteFocusRingQuads()
for non-text renderers. The focus ring encompasses descendants, which is
what we want for the accessibility indicator.
* rendering/RenderObject.cpp:
(WebCore::RenderObject::absoluteFocusRingQuads): Added.
* rendering/RenderObject.h:

LayoutTests: 

* accessibility/dimensions-include-descendants-expected.txt: Added.
* accessibility/dimensions-include-descendants.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@52783 268f45cc-cd09-0410-ab3c-d52691b4dbfc