Bug 1034528, part 1 - Get rid of gfxCachedTempSurface and the Thebes backed gfxContext that it creates. r=Bas
Bug 1034528, part 2 - Remove the Thebes backed gfxContext propagating code from nsCanvasFrame. r=Bas
Bug 1034528, part 3 - Remove the Thebes backed gfxContext propagating code from nsFilterInstance. r=Bas