Implement onMakeClone function on all subclasses of SkTypeface except
on mac.

Change-Id: I2b8777a5b54e190c37623ab798a89b4f1833ceac
Reviewed-on: https://skia-review.googlesource.com/137382
Commit-Queue: Bruce Wang <brucewang@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
9 files changed