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This reverts commit 07a90a91.

Revert "Fixes bug in Media.AudioInputCbErrorMac histogram."

This reverts commit beaa161b.

Rationale: appears to make AppRTC hang on Mac. This looks like the
only related CL in the blamelist, speculatively reverting.

BUG=428706
TBR=xians@chromium.org

Review URL: https://codereview.chromium.org/695393002

Cr-Commit-Position: refs/heads/master@{#302491}