[graphite] Fix CallbackResult def

kFailed should be false.

Change-Id: I8dd0e79f05301ff8e4b10264b1c1883e267baa11
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/660860
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed