No longer using default Globals constructor in Metal shader code

Bug: skia:9736
Change-Id: If572ddae3c6aa42faa498b2fe3bf2fa25fd00bf1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/261276
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed