Remove the 'audioDebugRecording' media constraint and the aec_dump AudioOptions flag.

webrtc/api/mediaconstraintsinterface.cc

 /*
  *  Copyright 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 32 matching lines @@
     "googAutoGainControl2";
 const char MediaConstraintsInterface::kNoiseSuppression[] =
     "googNoiseSuppression";
 const char MediaConstraintsInterface::kExperimentalNoiseSuppression[] =
     "googNoiseSuppression2";
 const char MediaConstraintsInterface::kHighpassFilter[] =
     "googHighpassFilter";
 const char MediaConstraintsInterface::kTypingNoiseDetection[] =
     "googTypingNoiseDetection";
 const char MediaConstraintsInterface::kAudioMirroring[] = "googAudioMirroring";
-const char MediaConstraintsInterface::kAecDump[] = "audioDebugRecording";
 
 // Google-specific constraint keys for a local video source (getUserMedia).
 const char MediaConstraintsInterface::kNoiseReduction[] = "googNoiseReduction";
 
 // Constraint keys for CreateOffer / CreateAnswer defined in W3C specification.
 const char MediaConstraintsInterface::kOfferToReceiveAudio[] =
     "OfferToReceiveAudio";
 const char MediaConstraintsInterface::kOfferToReceiveVideo[] =
     "OfferToReceiveVideo";
 const char MediaConstraintsInterface::kVoiceActivityDetection[] =
@@ skipping 59 matching lines @@
       ++*mandatory_constraints;
     return rtc::FromString(string_value, value);
   }
   if (constraints->GetOptional().FindFirst(key, &string_value)) {
     return rtc::FromString(string_value, value);
   }
   return false;
 }
 
 }  // namespace webrtc