tree 78c3b12bfe86bd6046f81ed12eea5dc19b28a161
parent b0ee6dd6e5567fae1986a70f5be1b88486622dfc
author Doug Evans <dje@google.com> 1537458302 -0700
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1537579014 +0000

[tracing] Add more logging of errors

Plus add some clarifying comments to provider.h.

Tested: runtests
Plus observe some new error messages while debugging DX-448

Change-Id: Iba682eeab128326cf32e5e9c0f90ba774356b1b4