Implement the NackModule as part of the new jitter buffer.

webrtc/modules/modules.gyp

 # Copyright (c) 2011 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': [
@@ skipping 346 matching lines @@
             'video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc',
             'video_coding/codecs/vp8/simulcast_unittest.cc',
             'video_coding/codecs/vp8/simulcast_unittest.h',
             'video_coding/codecs/vp9/screenshare_layers_unittest.cc',
             'video_coding/include/mock/mock_vcm_callbacks.h',
             'video_coding/bitrate_adjuster_unittest.cc',
             'video_coding/decoding_state_unittest.cc',
             'video_coding/jitter_buffer_unittest.cc',
             'video_coding/jitter_estimator_tests.cc',
             'video_coding/media_optimization_unittest.cc',
+            'video_coding/nack_module_unittest.cc',
             'video_coding/receiver_unittest.cc',
             'video_coding/session_info_unittest.cc',
             'video_coding/timing_unittest.cc',
             'video_coding/video_coding_robustness_unittest.cc',
             'video_coding/video_receiver_unittest.cc',
             'video_coding/video_sender_unittest.cc',
             'video_coding/qm_select_unittest.cc',
             'video_coding/test/stream_generator.cc',
             'video_coding/test/stream_generator.h',
             'video_coding/utility/quality_scaler_unittest.cc',
@@ skipping 313 matching lines @@
               'sources': [
                 'video_render_tests.isolate',
               ],
             },
           ],
         }],
       ],
     }], # include_tests
   ], # conditions
 }