use drawSimpleText

Bug: skia:
Change-Id: I4aa6190e66478595a409f93a406fd42f19394302
Reviewed-on: https://skia-review.googlesource.com/c/180927
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>