Fix a M23 stable crash issue for device enumeration on Mac

content/browser/device_monitor_mac.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_BROWSER_DEVICE_MONITOR_MAC_H_
 #define CONTENT_BROWSER_DEVICE_MONITOR_MAC_H_
 
+#include <CoreAudio/AudioHardware.h>
 #include <IOKit/IOKitLib.h>
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/system_monitor/system_monitor.h"
 
 namespace content {
 
 class DeviceMonitorMac {
  public:
   DeviceMonitorMac();
   ~DeviceMonitorMac();
 
  private:
   void RegisterAudioServices();
   void RegisterVideoServices();
 
-  static void AudioDeviceCallback(void *context, io_iterator_t iterator);
-  static void VideoDeviceCallback(void *context, io_iterator_t iterator);
+  static OSStatus AudioDeviceCallback(
+      AudioObjectID object, UInt32 size,
+      const AudioObjectPropertyAddress addresses[],
+      void* context);
+
+  static void VideoDeviceCallback(void* context, io_iterator_t iterator);
 
   // Forward the notifications to system monitor.
   void NotifyDeviceChanged(base::SystemMonitor::DeviceType type);
 
   // Helper.
   void RegisterServices(CFMutableDictionaryRef dictionary,
                         IOServiceMatchingCallback callback);
 
   IONotificationPortRef notification_port_;
   std::vector<io_iterator_t*> notification_iterators_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceMonitorMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVICE_MONITOR_MAC_H_