BUILD FIX: Make AccessibilityUIElementIOS.mm build on iOS

Reviewed by Chris Fleizach.

* DumpRenderTree/ios/AccessibilityUIElementIOS.mm: Declare
-_accessibilityPath from the WebAccessibilityObjectWrapper
class.
(_CGPathEnumerationIteration): Remove unused CGPoint* variable.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148328 268f45cc-cd09-0410-ab3c-d52691b4dbfc