This should make error messages more friendly and easier to address.

Bug: 570091
Change-Id: Id43d6ecdc5521b07fbe684b6fdbcc09f6fbc6448
Reviewed-on: https://chromium-review.googlesource.com/513907Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Paweł Hajdan Jr. <phajdan.jr@chromium.org>