Bug 1082575 - Make PrintUtils and printPreviewBindings.xml more e10s friendly. r=Mossop.

--HG--
extra : rebase_source : 596e10532227d9ac78ba66c6fd3bea4e184f659b
extra : histedit_source : 6f8f10265bd730f3f0b7fade402d6b2859ec0892