This reverts commit 34cdd2d402b08aee4e17a6fd38c87e0e5cd7aa30. Reason for revert: Breaks Chromium Original change's description: > Remove AudioDeviceObserver and make ADM not inherit from the Module interface. > > (Re-upload of https://codereview.webrtc.org/3020493002/) > > Bug: webrtc:4690, webrtc:7306 > Change-Id: I67fb9ebca1296aabc08eae8a292a5c69832dc35e > Reviewed-on: https://webrtc-review.googlesource.com/5360 > Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org> > Reviewed-by: Henrik Andreassson <henrika@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#20083} TBR=solenberg@webrtc.org,henrika@webrtc.org Change-Id: Iad03cafb7865f5a22394c3d4d1d3ff3e0fccd4ff No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: webrtc:4690, webrtc:7306 Reviewed-on: https://webrtc-review.googlesource.com/5402 Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org> Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20085}