Enforce C-style identifier rules for matrix markers everywhere

Change-Id: I3cc189a77ce5001a828cdc4e73ea9c80c91554b1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/286438
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
5 files changed