Add processor name to comment when printing out shaders.

BUG=skia:

Review URL: https://codereview.chromium.org/735153002
allow pictures to have a full bounds

BUG=skia:

Review URL: https://codereview.chromium.org/736583004
Revert of allow pictures to have a full bounds (patchset #3 id:40001 of https://codereview.chromium.org/736583004/)

Reason for revert:
needed to update legacy width() helpers

Original issue's description:
> allow pictures to have a full bounds
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/7e76bff26e7c74902841ca4f607eb0b24a833a4a

TBR=fmalita@google.com,mtklein@google.com,robertphillips@google.com,fmalita@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/722043005