- Update MockAudioProcessing to current APM interface. - Replace calls to VoEAudioProcessing::Start/StopAecDump with direct calls on APM. - Add AudioProcessing* in WVoE, get it from VoE, so we can call directly on APM. BUG=webrtc:4690 Review-Url: https://codereview.webrtc.org/2446143002 Cr-Commit-Position: refs/heads/master@{#14786}