Create a private API for controlling WebRTC's AEC3

chrome/browser/resources/hangout_services/thunk.js

Index: chrome/browser/resources/hangout_services/thunk.js
diff --git a/chrome/browser/resources/hangout_services/thunk.js b/chrome/browser/resources/hangout_services/thunk.js
index 68c28bf7dc51a5a1b8a4983c1516ba7e0bb889ca..f3e74c85c48c7cc964fa1470774400ce40a90582 100644
--- a/chrome/browser/resources/hangout_services/thunk.js
+++ b/chrome/browser/resources/hangout_services/thunk.js
@@ -202,6 +202,11 @@ chrome.runtime.onMessageExternal.addListener(
           chrome.webrtcLoggingPrivate.stopWebRtcEventLogging(
               requestInfo, origin, doSendResponse);
           return true;
+        } else if (method == 'setAudioExperiments') {
+          var experiments = message['experiments'];
+          chrome.webrtcAudioPrivate.setAudioExperiments(
+              requestInfo, origin, experiments);
+          return true;

[Henrik Grunell, 2017/04/10 12:33:47]

Here, you have to do

doSendResponse();
return false;

(instead of return true;)

See for example logging.uploadOnRenderClose above.

[hlundin-chromium, 2017/04/10 13:03:17]

Done.

         }
 
         throw new Error('Unknown method: ' + method);