Add field to directly pass glyphs when using glyph encoding

Change-Id: Iad7c9d7a801c961d2c5965012af16659d55a371c
Reviewed-on: https://skia-review.googlesource.com/140340
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed