Replace some std::tie with auto []

Change-Id: I388eb8022a17bc58ea906460970a6c8f162601e7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/257679
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
4 files changed