Now that start is returned as the default (initial) value of text-align (see bug 79914), support for use of the older -webkit-auto value should be removed.
We should to make sure that -webkit-auto and start does the same thing. It didn't the last time I checked.
(In reply to comment #1)
> We should to make sure that -webkit-auto and start does the same thing. It didn't the last time I checked.
As far as I can tell, there is no formatting/rendering difference, since they both map to ETextAlign::TASTART. The only difference I can determine is that if an author explicitly sets a specified style to -webkit-auto, then performing a query on that specified style will return -webkit-auto. However, when performing a query on the computed style, start is returned.
By specified style I am referring to set/get on elt.style.textAlign. By computed style I am referring to get on getComputedStyle(elt).textAlign.
If you believe there is some other difference, please let me know more detail.