Fix a data race in AudioEncoderMutableImpl and derived classes

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 46 matching lines @@
             'acm_receive_test',
             'acm_send_test',
             'audio_coding_module',
             'audio_device'  ,
             'audio_processing',
             'audioproc_test_utils',
             'bitrate_controller',
             'bwe_simulator',
             'cng',
             'desktop_capture',
+            'isac',
             'isac_fix',
             'media_file',
             'neteq',
             'neteq_test_support',
             'neteq_unittest_tools',
             'paced_sender',
             'pcm16b',  # Needed by NetEq tests.
             'red',
             'remote_bitrate_estimator',
             'rtp_rtcp',
@@ skipping 374 matching lines @@
               'sources': [
                 'modules_unittests.isolate',
               ],
             },
           ],
         }],
       ],
     }], # include_tests
   ], # conditions
 }