This change has the potential to break existing clients if they pass
nullptr as the childShaderName, which used to be supported. To fix
this breakage, pass the empty string instead of null.
Change-Id: I984ec0e12be5bb0a82ec5b719fec48ee7d577dc4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/557898
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
8b2633215e