track SkNoPixelsDevice's origin

Today we do a fairly decent job of tracking device bounds as an SkIRect,
with a little more of that plumbed through here, but that gets foiled in
SkNoPixelsDevice's constructor where we only look at bounds.width() and
bounds.height().

I think the idea was to follow the usual constraint that a "base" layer
has an origin at (0,0) and only temporary "save" layers on top might be
offset, but for a device without any pixels it's pretty reasonable for
the base layer to be offset too.

This makes picture_cull_rect draw correctly in serialize-8888 mode.

Bug: skia:9334
Change-Id: I845e74779bb21cbfd4051b0ef07381e684176eac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/236859
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
10 files changed