Remove more unused ownership arguments

Technically, we only ever pass kAdopt along one specific code path, but
the remaining functions that have it are at least all similar. This was
another outlier that seems unlikely to ever benefit.

BUG=skia:

Change-Id: If9a1275a2a0b83417225660f5e18c2133681830a
Reviewed-on: https://skia-review.googlesource.com/9494
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
3 files changed