In DM, use an SkSurface for CPU configs

Some GMs were trying to test for recording backends by calling:


... surprisingly, this was returning nullptr on CPU configs, because we
were using the canvas-from-bitmap constructor.

Change-Id: Ic343c3ae9470479911f33cb5c248e261345175f6
Reviewed-by: John Stiles <>
Auto-Submit: Brian Osman <>
Commit-Queue: Brian Osman <>
Reviewed-by: Jim Van Verth <>
1 file changed