~CaptureManager: DCHECK(capture_states_.empty()) instead of CHECK until we fix not empty bug.

BUG=chromium:320200
R=perkj@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/49579004

Cr-Commit-Position: refs/heads/master@{#8922}
1 file changed