| Index: content/renderer/media/media_stream_audio_source.h
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| diff --git a/content/renderer/media/media_stream_audio_source.h b/content/renderer/media/media_stream_audio_source.h
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| index 392dac046bb492b87ce6b1219249de29f1da9011..5b8a00172e7e62de9dcfabf7885510a2838dab99 100644
 | 
| --- a/content/renderer/media/media_stream_audio_source.h
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| +++ b/content/renderer/media/media_stream_audio_source.h
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| @@ -132,6 +132,9 @@ class CONTENT_EXPORT MediaStreamAudioSource
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|    // thread to stop the source soon.
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|    void StopSourceOnError(const std::string& why);
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|  
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| +  // Sets muted state and notifies it to all registered tracks.
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| +  void SetMutedState(bool state);
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| +
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|   private:
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|    // MediaStreamSource override.
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|    void DoStopSource() final;
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| 
 |