ARIA based nsIAccessible states testing

Mozilla Bug 457219
Mozilla Bug 429285 Mozilla Bug 499653 Mozilla Bug 681674 Mozilla Bug 681674 Mozilla Bug 699017 Mozilla Bug 689847 Mozilla Bug 457226 Mozilla Bug 740851 Mozilla Bug 762876

combobox
combobox
I agree
I might agree
Button
This text should be readonly
Item1
Item 1
Item 2
Item 3
Item 4
A slider
Item 1
Item 2
This text should be offscreen
menuitem button checkbox link link app main nav app main nav
scrollbar
horizontal scrollbar
vertical scrollbar
separator
horizontal separator
vertical separator
slider
horizontal slider
vertical slider