Add support for audio input mute detection on all platforms

media/audio/android/audio_record_input.h

 // Copyright 2013 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.
 
 #ifndef MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_
 #define MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_
 
 #include "base/android/jni_android.h"
 #include "base/threading/thread_checker.h"
 #include "media/audio/audio_io.h"
@@ skipping 22 matching lines @@
   // Implementation of AudioInputStream.
   virtual bool Open() override;
   virtual void Start(AudioInputCallback* callback) override;
   virtual void Stop() override;
   virtual void Close() override;
   virtual double GetMaxVolume() override;
   virtual void SetVolume(double volume) override;
   virtual double GetVolume() override;
   virtual void SetAutomaticGainControl(bool enabled) override;
   virtual bool GetAutomaticGainControl() override;
+  virtual bool IsMuted() override;
 
   static bool RegisterAudioRecordInput(JNIEnv* env);
 
   // Called from Java when data is available.
   void OnData(JNIEnv* env, jobject obj, jint size, jint hardware_delay_bytes);
 
   // Called from Java so that we can cache the address of the Java-managed
   // |byte_buffer| in |direct_buffer_address_|.
   void CacheDirectBufferAddress(JNIEnv* env, jobject obj, jobject byte_buffer);
 
@@ skipping 14 matching lines @@
 
   scoped_ptr<media::AudioBus> audio_bus_;
   int bytes_per_sample_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRecordInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_ANDROID_AUDIO_RECORD_INPUT_H_