impl breakText in SkFont

Bug: skia:
Change-Id: I449e0b29f98dc194a335be476f6dbdd69efad16b
Reviewed-on: https://skia-review.googlesource.com/c/174504
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2 files changed