Use the absolute magnitude instead of the bar level as the level of the input signal

content/renderer/media/media_stream_audio_level_calculator.h

Index: content/renderer/media/media_stream_audio_level_calculator.h
diff --git a/content/renderer/media/media_stream_audio_level_calculator.h b/content/renderer/media/media_stream_audio_level_calculator.h
index 1440d2bff2cdf33e825bc3b9b65cf79f47dbe247..41c9c34f7be1b2f803941ca2429417ddc8eb4fdc 100644
--- a/content/renderer/media/media_stream_audio_level_calculator.h
+++ b/content/renderer/media/media_stream_audio_level_calculator.h
@@ -20,8 +20,7 @@ class MediaStreamAudioLevelCalculator {
   ~MediaStreamAudioLevelCalculator();
 
   // Calculates the signal level of the audio data.
-  // Returns the level of bars that the volume animation UI uses for
-  // presenting the energy level of the audio data.
+  // Returns the absolute value of the amplitude of the signal.
   int Calculate(const int16* audio_data, int number_of_channels,
                 int number_of_frames);