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

media/device_monitors/device_monitor_mac.mm

 // 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/device_monitors/device_monitor_mac.h"
 
 #include <set>
 
 #include "base/bind_helpers.h"
 #include "base/logging.h"
@@ skipping 103 matching lines @@
                              (it->type() == DeviceInfo::kMuxed) ||
                              (it->type() == DeviceInfo::kInvalid));
     DVLOG(1) << "Device has been removed, id: " << it->unique_id();
   }
   // Update the cached devices with the current system snapshot.
   cached_devices_ = snapshot_devices;
 
   if (video_device_added || video_device_removed)
     monitor_->NotifyDeviceChanged(base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE);
   if (audio_device_added || audio_device_removed)
-    monitor_->NotifyDeviceChanged(base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE);
+    monitor_->NotifyDeviceChanged(base::SystemMonitor::DEVTYPE_AUDIO);
 }
 
 // Forward declaration for use by CrAVFoundationDeviceObserver.
 class SuspendObserverDelegate;
 
 }  // namespace
 
 // This class is a Key-Value Observer (KVO) shim. It is needed because C++
 // classes cannot observe Key-Values directly. Created, manipulated, and
 // destroyed on the UI Thread by SuspendObserverDelegate.
@@ skipping 331 matching lines @@
 }
 
 void DeviceMonitorMac::NotifyDeviceChanged(
     base::SystemMonitor::DeviceType type) {
   DCHECK(thread_checker_.CalledOnValidThread());
   // TODO(xians): Remove the global variable for SystemMonitor.
   base::SystemMonitor::Get()->ProcessDevicesChanged(type);
 }
 
 }  // namespace media