Add UMA reporting for audio hardware parameters.

media/audio/sample_rates.h

Index: media/audio/sample_rates.h
diff --git a/media/audio/sample_rates.h b/media/audio/sample_rates.h
index 9d47a138bc2afd6784478aa14ba4b5daf5b4f91d..7c29e548b340e385512eedf82821a0f9f15f7060 100644
--- a/media/audio/sample_rates.h
+++ b/media/audio/sample_rates.h
@@ -10,8 +10,8 @@
 namespace media {
 
 // Enumeration used for histogramming sample rates into distinct buckets.
+// Logged to UMA, so never reuse a value, always add new/greater ones!
 enum AudioSampleRate {
-  // Do not change the order of these values.
   k8000Hz = 0,
   k16000Hz = 1,
   k32000Hz = 2,
@@ -20,6 +20,9 @@ enum AudioSampleRate {
   k11025Hz = 5,
   k22050Hz = 6,
   k44100Hz = 7,
+  k88200Hz = 8,
+  k176400Hz = 9,
+  k192000Hz = 10,
   kUnexpectedAudioSampleRate  // Must always be last!
 };