Pass separate texs so we don't cheat in drawVerts

Cheat == take a faster path that is not normally used by real clients.
This way the bench is more representative.

Change-Id: I37644ae5d05a00f217773dddba290eac9a2a846f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/431939
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Herb Derby <herb@google.com>
1 file changed