Regularize ownerships and lifecycle for storage monitor platform classes.

chrome/browser/storage_monitor/removable_device_notifications_chromeos.h

Index: chrome/browser/storage_monitor/removable_device_notifications_chromeos.h
diff --git a/chrome/browser/storage_monitor/removable_device_notifications_chromeos.h b/chrome/browser/storage_monitor/removable_device_notifications_chromeos.h
index be745499bc268a9916ffc98c6ec66693e2914d1e..5d34fe4f4d136f7c4450c774032e9ac04824f87c 100644
--- a/chrome/browser/storage_monitor/removable_device_notifications_chromeos.h
+++ b/chrome/browser/storage_monitor/removable_device_notifications_chromeos.h
@@ -22,6 +22,10 @@
 #include "chrome/browser/storage_monitor/storage_monitor.h"
 #include "chromeos/disks/disk_mount_manager.h"
 
+namespace chrome {
+class MediaTransferProtocolDeviceObserverLinux;
+}
+
 namespace chromeos {
 
 class RemovableDeviceNotificationsCros
@@ -32,6 +36,10 @@ class RemovableDeviceNotificationsCros
   // Should only be called by browser start up code. Use GetInstance() instead.
   RemovableDeviceNotificationsCros();
 
+  // Sets up disk listeners and issues notifications for any discovered
+  // mount points. Sets up MTP manager and listeners.
+  void Init();
+
   virtual void OnDiskEvent(disks::DiskMountManager::DiskEvent event,
                            const disks::DiskMountManager::Disk* disk) OVERRIDE;
   virtual void OnDeviceEvent(disks::DiskMountManager::DeviceEvent event,
@@ -91,6 +99,9 @@ class RemovableDeviceNotificationsCros
   // Only accessed on the UI thread.
   MountMap mount_map_;
 
+  scoped_ptr<chrome::MediaTransferProtocolDeviceObserverLinux>
+      media_transfer_protocol_device_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(RemovableDeviceNotificationsCros);
 };