Bug 828201 - Replace DEBUG constant by a preference across OS.File and add File.GET_DEBUG method used for testing. r=dteller
Bug 837730 - Add missing NULL definition so that updater will compile on some Linux platforms. r=rstrong
Bug 839621 - qcms_transform_create can return null, so indirect callers need to be ready for it as well. r=jmuizelaar
Bug 841207 - Handle all dominant-baseline values in SVG text layout. r=roc
Bug 839376 (part 8) - Fix another seven rooting hazards.  r=sfink.

--HG--
extra : rebase_source : 9863790dd2ad0cf043609986d046b84046527962