WebRtcVoiceEngine: Use AudioDecoderFactory to generate recv codecs.

webrtc/media/media.gyp

 # Copyright (c) 2016 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.
 
 {
   'includes': [ '../build/common.gypi', ],
@@ skipping 252 matching lines @@
             'base/rtputils_unittest.cc',
             'base/streamparams_unittest.cc',
             'base/turnutils_unittest.cc',
             'base/videoadapter_unittest.cc',
             'base/videobroadcaster_unittest.cc',
             'base/videocapturer_unittest.cc',
             'base/videocommon_unittest.cc',
             'base/videoengine_unittest.h',
             'base/videoframe_unittest.h',
             'engine/nullwebrtcvideoengine_unittest.cc',
+            'engine/payload_type_mapper_unittest.cc',
             'engine/simulcast_unittest.cc',
             'engine/webrtcmediaengine_unittest.cc',
             'engine/webrtcvideocapturer_unittest.cc',
             'engine/webrtcvideoframe_unittest.cc',
             'engine/webrtcvideoframefactory_unittest.cc',
             'engine/webrtcvideoengine2_unittest.cc',
             'engine/webrtcvoiceengine_unittest.cc',
             'sctp/sctpdataengine_unittest.cc',
           ],
           # TODO(kjellander): Make the code compile without disabling these flags.
@@ skipping 72 matching lines @@
               'sources': [
                 'rtc_media_unittests.isolate',
               ],
             },
           ],
         }],
       ],  # conditions
     }],  # include_tests==1
   ],  # conditions
 }