Revert of - Clean up unused voice engine DTMF code.

webrtc/modules/audio_coding/test/TwoWayCommunication.cc

 /*
  *  Copyright (c) 2012 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 @@
   _acmB.reset(AudioCodingModule::Create(config));
   config.id = 4;
   _acmRefB.reset(AudioCodingModule::Create(config));
 }
 
 TwoWayCommunication::~TwoWayCommunication() {
   delete _channel_A2B;
   delete _channel_B2A;
   delete _channelRef_A2B;
   delete _channelRef_B2A;
+#ifdef WEBRTC_DTMF_DETECTION
+  if (_dtmfDetectorA != NULL) {
+    delete _dtmfDetectorA;
+  }
+  if (_dtmfDetectorB != NULL) {
+    delete _dtmfDetectorB;
+  }
+#endif
   _inFileA.Close();
   _inFileB.Close();
   _outFileA.Close();
   _outFileB.Close();
   _outFileRefA.Close();
   _outFileRefB.Close();
 }
 
 void TwoWayCommunication::ChooseCodec(uint8_t* codecID_A,
                                       uint8_t* codecID_B) {
@@ skipping 221 matching lines @@
     if (((secPassed % 7) == 6) && (msecPassed == 0))
       EXPECT_EQ(0, _acmA->InitializeReceiver());
     // Re-register codec on side A.
     if (((secPassed % 7) == 6) && (msecPassed >= 990)) {
       EXPECT_EQ(0, _acmA->RegisterReceiveCodec(*codecInst_B));
     }
   }
 }
 
 }  // namespace webrtc