Move device notification impl out of chrome/browser/media_gallery

chrome/browser/media_gallery/media_device_notifications_chromeos.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.
-
-// chromeos::MediaDeviceNotifications listens for mount point changes and
-// notifies the SystemMonitor about the addition and deletion of media devices.
-
-#ifndef CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
-#define CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
-
-#if !defined(OS_CHROMEOS)
-#error "Should only be used on ChromeOS."
-#endif
-
-#include <map>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/system_monitor/system_monitor.h"
-#include "chromeos/disks/disk_mount_manager.h"
-
-namespace chromeos {
-
-class MediaDeviceNotifications
-    : public base::RefCountedThreadSafe<MediaDeviceNotifications>,
-      public disks::DiskMountManager::Observer {
- public:
-  MediaDeviceNotifications();
-
-  virtual void DiskChanged(disks::DiskMountManagerEventType event,
-                           const disks::DiskMountManager::Disk* disk) OVERRIDE;
-  virtual void DeviceChanged(disks::DiskMountManagerEventType event,
-                             const std::string& device_path) OVERRIDE;
-  virtual void MountCompleted(
-      disks::DiskMountManager::MountEvent event_type,
-      MountError error_code,
-      const disks::DiskMountManager::MountPointInfo& mount_info) OVERRIDE;
-
- private:
-  friend class base::RefCountedThreadSafe<MediaDeviceNotifications>;
-
-  // Mapping of mount points to mount device IDs.
-  typedef std::map<std::string, std::string> MountMap;
-
-  // Private to avoid code deleting the object.
-  virtual ~MediaDeviceNotifications();
-
-  // Checks existing mount points map for media devices. For each mount point,
-  // call CheckMountedPathOnFileThread() below.
-  void CheckExistingMountPointsOnUIThread();
-
-  // Checks if the mount point in |mount_info| is a media device. If it is,
-  // then continue with AddMountedPathOnUIThread() below.
-  void CheckMountedPathOnFileThread(
-      const disks::DiskMountManager::MountPointInfo& mount_info);
-
-  // Adds the mount point in |mount_info| to |mount_map_| and send a media
-  // device attach notification.
-  void AddMountedPathOnUIThread(
-      const disks::DiskMountManager::MountPointInfo& mount_info);
-
-  // Mapping of relevant mount points and their corresponding mount devices.
-  // Only accessed on the UI thread.
-  MountMap mount_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(MediaDeviceNotifications);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_