Add a gyp/gn variable for whether to use iLBC or not

webrtc/modules/audio_coding/neteq/neteq.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.
 
 {
   'variables': {
     'codecs': [
       'cng',
       'g711',
       'pcm16b',
     ],
     'neteq_defines': [],
     'conditions': [
+      ['include_ilbc==1', {
+        'codecs': ['ilbc',],
+        'neteq_defines': ['WEBRTC_CODEC_ILBC',],
+      }],
       ['include_opus==1', {
         'codecs': ['webrtc_opus',],
         'neteq_defines': ['WEBRTC_CODEC_OPUS',],
       }],
       ['build_with_mozilla==0', {
         'conditions': [
           ['target_arch=="arm"', {
             'codecs': ['isac_fix',],
             'neteq_defines': ['WEBRTC_CODEC_ISACFX',],
           }, {
             'codecs': ['isac',],
             'neteq_defines': ['WEBRTC_CODEC_ISAC',],
           }],
         ],
         'codecs': ['g722',],
         'neteq_defines': ['WEBRTC_CODEC_G722',],
       }],
-      ['build_with_mozilla==0 and build_with_chromium==0', {
-        'codecs': ['ilbc',],
-        'neteq_defines': ['WEBRTC_CODEC_ILBC',],
-      }],
     ],
     'neteq_dependencies': [
       '<@(codecs)',
       '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
       '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
       'audio_decoder_interface',
     ],
   },
   'targets': [
     {
@@ skipping 161 matching lines @@
               'dependencies': [
                 '<(apk_tests_path):audio_decoder_unittests_apk',
               ],
             },
           ],
         }],
       ],
     }], # include_tests
   ], # conditions
 }