Deactivated the intelligibility enhancement functionality by default

webrtc/build/common.gypi

 # 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.
 
 # This file contains common settings for building WebRTC components.
 
@@ skipping 100 matching lines @@
     # Selects fixed-point code where possible.
     'prefer_fixed_point%': 0,
 
     # Enable data logging. Produces text files with data logged within engines
     # which can be easily parsed for offline processing.
     'enable_data_logging%': 0,
 
     # Enables the use of protocol buffers for debug recordings.
     'enable_protobuf%': 1,
 
+    # Disable the code for the intelligibility enhancer by default.
+    'intelligibility_enhancer%': 0,

[kjellander_webrtc, 2016/08/26 13:22:12]

After comparing with other variables in this file,  I think this one should be
named enable_intelligibility_enhancer

[peah-webrtc, 2016/08/26 13:35:06]

Done.

+
     # Disable these to not build components which can be externally provided.
     'build_expat%': 1,
     'build_json%': 1,
     'build_libsrtp%': 1,
     'build_libvpx%': 1,
     'libvpx_build_vp9%': 1,
     'build_libyuv%': 1,
     'build_openmax_dl%': 1,
     'build_opus%': 1,
     'build_protobuf%': 1,
@@ skipping 471 matching lines @@
         }],
         ['OS=="freebsd"', {
           'defines': [
             'FREEBSD',
           ],
         }],
       ],
     },
   }, # target_defaults
 }