Fix flag collision in GrDrawVerticesOp

We were setting a flag meant for Mesh.fFlags on the Op's fFlags. Switch
the Mesh's flags to be a pair of bools, to avoid this in the future.

Bug: skia:
Change-Id: Ib660f3bc9c54874d088a85251f629758c365c8c6
Reviewed-on: https://skia-review.googlesource.com/17766
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed