Uses the conditions for the expectation to determine if there's a bug.
Necessary for the new loading mechanism which defers filtering.

Bug: angleproject:5951
Change-Id: Ic0c65438f7f155caff72b3ceeb4e65f8184c8efc
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2902666Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>