Reduce SORT_THRESHOLD to 256

perf.skia.org showed that reducing the threshold would only harm
path_fill_small_sawtooth, but will benefit many many skps and svgs
playback.

Bug: skia:
Change-Id: I38904548206521d78a7c9c5804c0d989b23dc405
TBR: caryclark@google.com, reed@google.com
Reviewed-on: https://skia-review.googlesource.com/29882
Reviewed-by: Yuqian Li <liyuqian@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>
1 file changed