This ensures that on service outages we get a clear early error message instead of something cryptic later down the line Bug: None Change-Id: Ib637ed97144284e3744aaa948f594f5795fa9c72 No-Try: True Reviewed-on: https://webrtc-review.googlesource.com/18040 Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org> Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Commit-Queue: Oleh Prypin <oprypin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20545}