Use SkSTArenaAlloc to handle the stack memory of the delta list

Bug: skia:
Change-Id: I5c98220498c71ced4565f492335cef2a372d0765
Reviewed-on: https://skia-review.googlesource.com/41743
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>
3 files changed