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Daniel Erat authoredIn an attempt to make login failures easier to debug, update several messages describing progress and errors to include string descriptions of numeric codes: Policy validation failed: 2 Session manager operation failed: 5 Failed to retrieve cros policies. Reason: 5 Resolved state to: 13 Bug: 888520 Change-Id: I8c331c6af7f68dd2e0aa7cdfc98336f4af27f9c2 Reviewed-on: https://chromium-review.googlesource.com/1249730Reviewed-by: Xiyuan Xia <xiyuan@chromium.org> Reviewed-by: Sergey Poromov <poromov@chromium.org> Commit-Queue: Dan Erat <derat@chromium.org> Cr-Commit-Position: refs/heads/master@{#595160} a4285863