Contains helpers for obtaining the source location of the caller
Bug: dawn:1342
Change-Id: I6eddf9140d10bc7889260392e04c3e2adec715d8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/87220
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>