route getFontMetrics to SkFont

Bug: skia:2664
Change-Id: I6ce7ff1a99101c7b4c8902a7d80e4a6338c9ed97
Reviewed-on: https://skia-review.googlesource.com/c/170278
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2 files changed