Use the device listener in Media on windows

content/browser/system_message_window_win.cc

 // 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 "content/browser/system_message_window_win.h"
 
 #include <dbt.h>
-#include <ks.h>
-#include <ksmedia.h>
 
 #include "base/logging.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/win/wrapped_window_proc.h"
+#include "media/audio/win/core_audio_util_win.h"
 
 namespace content {
 
 namespace {
 const wchar_t kWindowClassName[] = L"Chrome_SystemMessageWindow";
 
 // A static map from a device category guid to base::SystemMonitor::DeviceType.
 struct {
   const GUID device_category;
   const base::SystemMonitor::DeviceType device_type;
@@ skipping 14 matching lines @@
     Unregister();
   }
 
   void Register(HWND hwnd) {
     // Request to receive device notifications.  All applications receive basic
     // notifications via WM_DEVICECHANGE but in order to receive detailed device
     // arrival and removal messages, we need to register.
     DEV_BROADCAST_DEVICEINTERFACE filter = {0};
     filter.dbcc_size = sizeof(filter);
     filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
+    bool core_audio_support = media::CoreAudioUtil::IsSupported();
     for (int i = 0; i < arraysize(kDeviceCategoryMap); ++i) {
+      // If CoreAudio is supported, AudioDeviceListenerWin will
+      // take care of monitoring audio devices.
+      if (core_audio_support &&
+          KSCATEGORY_AUDIO == kDeviceCategoryMap[i].device_category) {
+        continue;
+      }
+
       filter.dbcc_classguid = kDeviceCategoryMap[i].device_category;
       DCHECK_EQ(notifications_[i], static_cast<HDEVNOTIFY>(NULL));
       notifications_[i] = RegisterDeviceNotification(
           hwnd, &filter, DEVICE_NOTIFY_WINDOW_HANDLE);
       DPLOG_IF(ERROR, !notifications_[i])
           << "RegisterDeviceNotification failed";
     }
   }
 
   void Unregister() {
@@ skipping 87 matching lines @@
     case WM_DEVICECHANGE:
       return OnDeviceChange(static_cast<UINT>(wparam), lparam);
     default:
       break;
   }
 
   return ::DefWindowProc(hwnd, message, wparam, lparam);
 }
 
 }  // namespace content