| Index: webrtc/modules/audio_mixer/audio_mixer_impl.h
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| diff --git a/webrtc/modules/audio_mixer/audio_mixer_impl.h b/webrtc/modules/audio_mixer/audio_mixer_impl.h
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| index af83367fc4ab10057c351c2d1a002220e5a940cc..b504f230a93802dfa04f58113c9cd823a8983c28 100644
 | 
| --- a/webrtc/modules/audio_mixer/audio_mixer_impl.h
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| +++ b/webrtc/modules/audio_mixer/audio_mixer_impl.h
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| @@ -63,6 +63,9 @@ class AudioMixerImpl : public AudioMixer {
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|    // mixer.
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|    bool GetAudioSourceMixabilityStatusForTest(Source* audio_source) const;
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|  
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| +  // Returns true if a source has been added but not removed.
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| +  bool GetSourcePresenceStatusForTest(Source* audio_source) const;
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| +
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|   protected:
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|    explicit AudioMixerImpl(std::unique_ptr<AudioProcessing> limiter);
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|  
 | 
| 
 |