Make SystemMonitor report all audio device changes instead of just audio capture.

chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_api.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/lazy_instance.h"
@@ skipping 55 matching lines @@
 }
 
 // static
 const char* WebrtcAudioPrivateEventService::service_name() {
   return "WebrtcAudioPrivateEventService";
 }
 
 void WebrtcAudioPrivateEventService::OnDevicesChanged(
     base::SystemMonitor::DeviceType device_type) {
   switch (device_type) {
-    case base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE:
+    case base::SystemMonitor::DEVTYPE_AUDIO:
     case base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE:
       SignalEvent();
       break;
 
     default:
       // No action needed.
       break;
   }
 }
 
@@ skipping 410 matching lines @@
     results_.reset(wap::GetAssociatedSink::Results::Create("").release());
   } else {
     results_.reset(
         wap::GetAssociatedSink::Results::Create(associated_sink_id).release());
   }
 
   SendResponse(true);
 }
 
 }  // namespace extensions