[perf_skottiewasm_lottieweb] Use 3 loops for more consistency

Bug: skia:9237
Change-Id: I3e0dcf713f66fe5b0de7f37b9e89c964a2af8f35
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228998
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
2 files changed