Revert of Adding bulk plot reffer to cached textblobs (patchset #7 id:110001 of https://codereview.chromium.org/1050113004/)

Reason for revert:
Breaks linux builder

Original issue's description:
> Adding bulk plot reffer to cached textblobs
>
> This change will prevent the atlas from evicting glyphs the TextBlob
> needs.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/7281c61e7bc689d484dcbda49be3cef4ce4f11c2

TBR=bsalomon@google.com,jvanverth@google.com,robertphillips@google.com,joshualitt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1061713003
7 files changed