Allow audio debug recordings through a private API extension.

chrome/browser/resources/hangout_services/thunk.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 chrome.runtime.onMessageExternal.addListener(
     function(message, sender, sendResponse) {
       function doSendResponse(value, errorString) {
         var error = null;
         if (errorString) {
           error = {};
@@ skipping 149 matching lines @@
           var outgoing = message['outgoing'] || false;
           chrome.webrtcLoggingPrivate.startRtpDump(
               requestInfo, origin, incoming, outgoing, doSendResponse);
           return true;
         } else if (method == 'logging.stopRtpDump') {
           var incoming = message['incoming'] || false;
           var outgoing = message['outgoing'] || false;
           chrome.webrtcLoggingPrivate.stopRtpDump(
               requestInfo, origin, incoming, outgoing, doSendResponse);
           return true;
+        } else if (method == 'logging.startAecDump') {
+          var seconds = message['seconds'] || 0;
+          chrome.webrtcLoggingPrivate.startAecDump(
+              seconds, doSendResponse);
+          return true;
+        } else if (method == 'logging.stopAecDump') {
+          chrome.webrtcLoggingPrivate.stopRtpDump(doSendResponse);
+          return true;
         }
         throw new Error('Unknown method: ' + method);
       } catch (e) {
         doSendResponse(null, e.name + ': ' + e.message);
       }
     }
 );
 
 // If Hangouts connects with a port named 'onSinksChangedListener', we
 // will register a listener and send it a message {'eventName':
@@ skipping 110 matching lines @@
     onSinksChangedPort(port);
   } else if (port.name == 'chooseDesktopMedia') {
     onChooseDesktopMediaPort(port);
   } else if (port.name == 'processCpu') {
     onProcessCpu(port);
   } else {
     // Unknown port type.
     port.disconnect();
   }
 });