[skottie] Add TrivialFontRunIterator build option

https://skia-review.googlesource.com/c/skia/+/761237 introduced an
explicit FontMgrRunIterator, which can trigger font fallback (previously
impossible with SkShaper_primitive).

This causes issues for clients which don't have a fallback-capable
fontmgr.

Allow clients to opt into using a TrivialFontRunIterator.

Bug: chromium:1520148
Change-Id: Ie8530d01f0c61daecb3c888c51e2c8a4c414738d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/805536
Reviewed-by: Ben Wagner <bungeman@google.com>
Reviewed-by: Florin Malita <fmalita@google.com>
Commit-Queue: Florin Malita <fmalita@google.com>
(cherry picked from commit 29b545e4356bda0dcf49e264528edbd28af570d2)
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/806936
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Florin Malita <fmalita@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
1 file changed