Bug 1073086. Remove broken snapping code. r=mwoodrow

We generate a Rect from integers and then round them to do the snapping.

-      Rect rect(r->x, r->y, r->width, r->height);
-
-      rect.Round();

This accomplishes nothing.

Just rip it out.

--HG--
extra : rebase_source : 3194652ca83f2e66ae1cbd02573ab86c444bd2fb