SkPDF: be smarter about checking to see if a new font is needed.

Change-Id: Iad58fccf475649246a4fc9e2dc933b9a73b786d6
Reviewed-on: https://skia-review.googlesource.com/c/163240
Commit-Queue: Hal Canary <halcanary@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2 files changed