Detect AudioInputStream muting and propagate to MediaStreamAudioSource.

content/renderer/media/audio_input_message_filter.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_INPUT_MESSAGE_FILTER_H_
 #define CONTENT_RENDERER_MEDIA_AUDIO_INPUT_MESSAGE_FILTER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 61 matching lines @@
 #else
                        base::FileDescriptor socket_descriptor,
 #endif
                        uint32_t length,
                        uint32_t total_segments);
 
   // Received when internal state of browser process' audio input stream has
   // encountered an error.
   void OnStreamError(int stream_id);
 
+  // Received when a stream is muted or unmuted.
+  void OnStreamMuted(int stream_id, bool is_muted);
+
   // A map of stream ids to delegates.
   IDMap<media::AudioInputIPCDelegate*> delegates_;
 
   // IPC sender for Send(), must only be accesed on |io_task_runner_|.
   IPC::Sender* sender_;
 
   // Task runner on which IPC calls are executed.
   const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   // The singleton instance for this filter.
   static AudioInputMessageFilter* g_filter;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_AUDIO_INPUT_MESSAGE_FILTER_H_