Add support for audio input mute detection on all platforms

media/audio/mac/audio_input_mac.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/mac/audio_input_mac.h"
 
 #include <CoreServices/CoreServices.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 118 matching lines @@
 
 void PCMQueueInAudioInputStream::SetVolume(double volume) {
   NOTREACHED() << "Only supported for low-latency mode.";
 }
 
 double PCMQueueInAudioInputStream::GetVolume() {
   NOTREACHED() << "Only supported for low-latency mode.";
   return 0.0;
 }
 
+bool PCMQueueInAudioInputStream::IsMuted() {
+  NOTREACHED() << "Only supported for low-latency mode.";
+  return false;
+}
+
 void PCMQueueInAudioInputStream::SetAutomaticGainControl(bool enabled) {
   NOTREACHED() << "Only supported for low-latency mode.";
 }
 
 bool PCMQueueInAudioInputStream::GetAutomaticGainControl() {
   NOTREACHED() << "Only supported for low-latency mode.";
   return false;
 }
 
 void PCMQueueInAudioInputStream::HandleError(OSStatus err) {
@@ skipping 89 matching lines @@
       // complications than it solves (memory barrier issues accessing it from
       // multiple threads, looses the means to indicate OnClosed to client).
       // Should determine if we need to do something equivalent here.
       return;
     }
     HandleError(err);
   }
 }
 
 }  // namespace media