Add Graphite support for runtime effect tests.

One of the 18 tests is disabled because the paint color does not pass
through when evaluating a null child effect. (This also affects GMs
`null_child_rt` and `default_color_rt`.) A fix is on deck at

Change-Id: I90255536ffe990311d16d41a2fe48b491e432f21
Reviewed-by: Jim Van Verth <>
Commit-Queue: John Stiles <>
1 file changed