Replace SkSL-specific macros with Skia equivalents.

ABORT will be tackled in a followup CL since, unlike the others, it is
heavily used.

Change-Id: I96c092b6c07a3311cf8467b960b8f5e32c2074cb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/364640
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
5 files changed