| Index: webrtc/modules/audio_processing/audio_buffer.cc
 | 
| diff --git a/webrtc/modules/audio_processing/audio_buffer.cc b/webrtc/modules/audio_processing/audio_buffer.cc
 | 
| index 81790a159be933342591902f6c31dbfa22873cec..c1c4061f4884c727866fd185ec394974a4ed7bb8 100644
 | 
| --- a/webrtc/modules/audio_processing/audio_buffer.cc
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| +++ b/webrtc/modules/audio_processing/audio_buffer.cc
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| @@ -26,7 +26,7 @@ const size_t kSamplesPer48kHzChannel = 480;
 | 
|  int KeyboardChannelIndex(const StreamConfig& stream_config) {
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|    if (!stream_config.has_keyboard()) {
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|      assert(false);
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| -    return -1;
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| +    return 0;
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|    }
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|  
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|    return stream_config.num_channels();
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| 
 |