fonts: Add support for distance field text to font remoting.

R=jvanverth@google.com, herb@google.com

Bug: skia:7913
Change-Id: Id3f5b3e75005be9a7234df774268359b406c99a8
Reviewed-on: https://skia-review.googlesource.com/128970
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Khusal Sagar <khushalsagar@chromium.org>
8 files changed