5f4b7e2873
We use this Config struct for enabling/disabling Extended filter mode in AEC. This change renames it to ExtendedFilter for readability reasons. The corresponding media constraint is also renamed to kExtendedFilterEchoCancellation. The old Config is kept in parallel with the new during a transition period. This is to avoid problems with API breakages. During this period, if any of the two Configs are enabled, the extended filter mode is engaged in APM. That is, the two Configs are combined with an "OR" operation. This change also renames experimental_aec in AudioOptions to extended_filter_aec. BUG=4696 R=bjornv@webrtc.org, tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/54659004 Cr-Commit-Position: refs/heads/master@{#9378}