Let skslc use more of Skia's core

With these changes, SkTArray/SkSTArray can be used.

Change-Id: Ibf9a720086ac4342157a665786afac713d56c300
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/321786
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
3 files changed