Add testCompile function to SkRuntimeColorFilterFactory for Chrome test

Change-Id: I31f5bf4257e8404f41b146b7e64169968d3cd291
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/258804
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed