shader cache now ignores shaders with a length of 0

Bug: skia:
Change-Id: I1dd9794ea424d862e53414fcd96885972ac2ba76
Reviewed-on: https://skia-review.googlesource.com/73721
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed