Regularize ownerships and lifecycle for storage monitor platform classes.

chrome/browser/storage_monitor/removable_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::RemovableDeviceNotificationsCros listens for mount point changes
 // and notifies listeners about the addition and deletion of media
 // devices.
 
 #ifndef CHROME_BROWSER_STORAGE_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_CHROMEOS_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_REMOVABLE_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 "chrome/browser/storage_monitor/removable_storage_notifications.h"
 #include "chromeos/disks/disk_mount_manager.h"
 
+namespace chrome {
+class MediaTransferProtocolDeviceObserverLinux;
+}
+
 namespace chromeos {
 
 class RemovableDeviceNotificationsCros
     : public chrome::RemovableStorageNotifications,
       public base::RefCountedThreadSafe<RemovableDeviceNotificationsCros>,
       public disks::DiskMountManager::Observer {
  public:
   // Should only be called by browser start up code. Use GetInstance() instead.
   RemovableDeviceNotificationsCros();
 
@@ skipping 49 matching lines @@
   // device attach notification. |has_dcim| is true if the attached device has
   // a DCIM folder.
   void AddMountedPathOnUIThread(
       const disks::DiskMountManager::MountPointInfo& mount_info,
       bool has_dcim);
 
   // Mapping of relevant mount points and their corresponding mount devices.
   // Only accessed on the UI thread.
   MountMap mount_map_;
 
+  scoped_ptr<chrome::MediaTransferProtocolDeviceObserverLinux>
+      media_transfer_protocol_device_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(RemovableDeviceNotificationsCros);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_CHROMEOS_H_