Remove origin from GrClipStackClip and GrWindowRectsState.

Change-Id: I993f426fee0f21cf1f529f58d242de3017253678
Reviewed-on: https://skia-review.googlesource.com/9623
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>
18 files changed