peah e985b3fe49 Adding metrics to AEC3.
This CL adds metrics reporting to AEC3.

BUG=webrtc:6018

Review-Url: https://codereview.webrtc.org/2722453002
Cr-Commit-Position: refs/heads/master@{#16929}
2017-03-01 06:08:53 +00:00
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2017-03-01 06:08:53 +00:00
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