implement SkTestTypeface::onCharsToGlyphs()

It has only been working for UTF32.

Change-Id: I69329dd43b6d240516e4ab40df6e8c9f7bebf8a8
Reviewed-on: https://skia-review.googlesource.com/70102
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed