SkPDF: paths as rects when possible

http://crrev.com/2269593003

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4652

Change-Id: I12e238e8f00ac1c54a1b8dcf82a5502240563288
Reviewed-on: https://skia-review.googlesource.com/4652
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed