Ensure that data is not overwritten in the audio input shared memory ring buffer that sits on the b…

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 27455195e5988d3c44c62bad96bcef30c0a5c9a7..2e92bfa77c54e5f1a960e3a5e241ba0351aecba5 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -16495,6 +16495,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Bits per channel of HTML5 audio sample data.</summary>
 </histogram>
 
+<histogram name="Media.AudioCapturerMissedReadDeadline">
+  <owner>grunell@chromium.org</owner>
+  <summary>
+    The number of input audio read verifications that missed deadline. The read

[henrika (OOO until Aug 14), 2015/08/28 07:56:25]

"missed deadline". Can it be rewritten? "Missed a deadline set to.." or
something more specific.

[Henrik Grunell, 2015/08/28 12:21:57]

Tried to clarify this.

+    verification ensures that data is not overwritten in the shared ring buffer
+    on the browser/renderer boundary before read by the other side. Reported at
+    the destruction of low-latency audio input stream.
+  </summary>
+</histogram>
+
 <histogram name="Media.AudioChannelLayout" enum="ChannelLayout">
   <owner>dalecurtis@chromium.org</owner>
   <summary>Audio channel layout in HTML5 media.</summary>
@@ -16600,6 +16610,7 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="Media.AudioTrackProcessingStates"
     enum="AudioTrackProcessingStates">
+  <owner>grunell@chromium.org</owner>
   <summary>
     State of the media stream audio track processing, sampled once during the
     life time of a MediaStreamAudioProcessor.