Stop timeout in api_mock_gpu_canvas.

Large paths can lead to large processing times for path effects and
hence timeouts.

Also re-enables ShrinkToFit test until that code is finally removed,
but using the PathPriv interface instead.

Bug: oss-fuzz:39040
Change-Id: If3aeac0e8b67cecc6e536cafda01ed6d583655d2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/494240
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
2 files changed