Remove a bunch of dead fields found by Scythe.

media/audio/audio_parameters.h

Index: media/audio/audio_parameters.h
diff --git a/media/audio/audio_parameters.h b/media/audio/audio_parameters.h
index 8ce20704501d270fcf3caf5d10a1dc8087db163e..01d8869bbb4fc37e1b25bdac06d82fa164bdee07 100644
--- a/media/audio/audio_parameters.h
+++ b/media/audio/audio_parameters.h
@@ -39,12 +39,12 @@ class MEDIA_EXPORT AudioParameters {
     AUDIO_LAST_FORMAT         // Only used for validation of format.y
   };
 
-  // Telephone quality sample rate, mostly for speech-only audio.
-  static const uint32 kTelephoneSampleRate = 8000;
-  // CD sampling rate is 44.1 KHz or conveniently 2x2x3x3x5x5x7x7.
-  static const uint32 kAudioCDSampleRate = 44100;
-  // Digital Audio Tape sample rate.
-  static const uint32 kAudioDATSampleRate = 48000;
+  enum {
+    // Telephone quality sample rate, mostly for speech-only audio.
+    kTelephoneSampleRate = 8000,
+    // CD sampling rate is 44.1 KHz or conveniently 2x2x3x3x5x5x7x7.

[acolwell GONE FROM CHROMIUM, 2012/07/31 18:09:42]

nit: remove everything after the or?

[Ami GONE FROM CHROMIUM, 2012/07/31 18:14:43]

Dunno where this came from, leaving for now.

[Ami GONE FROM CHROMIUM, 2012/07/31 20:23:55]

FTR, this was introduced in http://codereview.chromium.org/17401; cpu@ says no
reason to keep so I'll drop it in another CL.

+    kAudioCDSampleRate = 44100,
+  };
 
   AudioParameters();
   AudioParameters(Format format, ChannelLayout channel_layout,