hide deprecated underline and strikethru

BUG=skia:6250

Change-Id: I85395e4960b16ab91237a74ff35e5b7588965512
Reviewed-on: https://skia-review.googlesource.com/8600
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
11 files changed