Backed out 5 changesets (bug 1218456) for Crashtest failures on dom/l10n/tests/mochitest/dom_localization/test_overlay.html. CLOSED TREE

Backed out changeset 31afe89c2d42 (bug 1218456)
Backed out changeset 8bd57ebc4528 (bug 1218456)
Backed out changeset e5d37afff36a (bug 1218456)
Backed out changeset e3da86278ecf (bug 1218456)
Backed out changeset 343046089f8e (bug 1218456)

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extra : rebase_source : f092d903c8c80581d187493e036b1875d8668b3d