Bug 950590 - Use nsRefPtr for gfxFontGroup's reference to the user font set, and support changing it from canvas context. r=roc, a=1.1+
Bug 950590 - Bustage fix. a=bustage
Backed out changesets 3cd79438d0ec and 3ba3af64ad64 (bug 950590) for bustage.
DONTBUILD
Bug 939472 - Remove buffer from multiview list when neutered. r=billm, a=preeti

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extra : rebase_source : 7113340a80cb442a2958a94541055df3b68afa30
Bug 950590 - Use nsRefPtr for gfxFontGroup's reference to the user font set, and support changing it from canvas context. r=roc, a=1.1+