tree 3506658fb7f97c94db4e3f689a7a48d2d7fbea77
parent 7e43138c0890bd99f627fa061b122c8d5716a99d
author andrew <andrew@webrtc.org> 1448674055 -0800
committer Commit bot <commit-bot@chromium.org> 1448674060 +0000

Don't overwrite audio stats when they're not available.

Chromium implements AudioProcessorInterface::GetStats(), but other
clients may not. The existing stats were getting overwritten with
default AudioProcessorStats values in that case.

Now, we only overwrite the stats if the track has an
AudioProcessorInterface. Also, move signal level out of
SetAudioProcessingStats() to avoid the "don't set if it's -1" pattern.

Review URL: https://codereview.webrtc.org/1469803004

Cr-Commit-Position: refs/heads/master@{#10831}