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Currently, only typeface digests (i.e. the output) are included. We now
include two likely lookup values: where the family name or the
PostScript name were looked up with default FontSelectionRequests. While
there will be many input digests that map to the same typeface, this
should handle a good chunk.

We also remove the duplicate signed integer copy of the typeface digest,
leaving only the unsigned version.

Bug: 1150480
Change-Id: I7f36061b5da4022984a908ba9988258094e9c5b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2548311Reviewed-by: Asanka Herath <asanka@chromium.org>
Commit-Queue: Alex Turner <alexmt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829242}