Rename functions in TestUtils.h

Change-Id: Iaa8a4ac57e967c6429473fb3a738d377a47fc2c7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/250799
Commit-Queue: Brian Salomon <bsalomon@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
18 files changed