Use SkFont instead of SkPaint for SkiaTextMetrics

Bug: skia:2664
Change-Id: I301b41217f901fe69d57dab9e69f7c468c34c0c9
Reviewed-on: https://chromium-review.googlesource.com/c/1338260
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609132}
2 files changed