Revert of Revert of make gm background colors 565 compatible (patchset #1 id:1 of...

Revert of Revert of make gm background colors 565 compatible (patchset #1 id:1 of https://codereview.chromium.org/1184123002/)

Reason for revert:
underlying problem with portable refs deleted more than once fixed

Original issue's description:
> Revert of make gm background colors 565 compatible (patchset #2 id:20001 of https://codereview.chromium.org/1176243006/)
>
> Reason for revert:
> breaks many bots with refcnt error
>
> Original issue's description:
> > make gm background colors 565 compatible
> >
> > Change a batch of GM tests to convert their background color
> > so that it is representable in 8888 and 565.
> >
> > Enable portable text in those same tests to minimize platform
> > differences.
> >
> > In a couple of bitmap tests, use portable typefaces instead of
> > choosing 'Times' which may or may not be available on the platform.
> >
> > R=borenet@google.com
> >
> > Committed: https://skia.googlesource.com/skia/+/be7f768a357aefb39c42d24b81b24d647bb6ab70
>
> TBR=borenet@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://skia.googlesource.com/skia/+/0bdb08b1ba8fbd18c4838f86a23f1ef4b3a3bfdf

TBR=borenet@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1182403003