improvements to shaper_ct

- fix CF leaks
- handle memory allocs better (using arena)

Change-Id: I0282bac288f7e5a785b6aab100251edde4b06b3f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/267079
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
1 file changed