Have various software uploaders in gpu backend use views.

Bug: skia:9556
Change-Id: I1ac3744632b6e926f79e182d4cd9d59498699aee
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/269896
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
7 files changed