Disable 461917-1.xhtml under dom/xul/crashtests/ because I cannot reproduce
it locally.
Annotate assert-if on some crashtests (bug 1370830). Other modifications are
all removal of fails-if.
MozReview-Commit-ID: 6Q2A5M5rOry
--HG--
extra : rebase_source : b282a919fcda6287fe2eaa6b139a11f2663ad578