Isolated FS for media devices.

chrome/browser/media_gallery/media_file_system_registry.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.
 
 // MediaFileSystemRegistry registers pictures directories and media devices as
 // File API filesystems and keeps track of the path to filesystem ID mappings.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERY_MEDIA_FILE_SYSTEM_REGISTRY_H_
 #define CHROME_BROWSER_MEDIA_GALLERY_MEDIA_FILE_SYSTEM_REGISTRY_H_
 
@@ skipping 54 matching lines @@
  private:
   friend struct base::DefaultLazyInstanceTraits<MediaFileSystemRegistry>;
 
   // Mapping of media directories to filesystem IDs.
   typedef std::map<FilePath, std::string> MediaPathToFSIDMap;
 
   // Mapping of RPH to MediaPathToFSIDMaps.
   typedef std::map<const content::RenderProcessHost*,
                    MediaPathToFSIDMap> ChildIdToMediaFSMap;
 
-  // Mapping of device id to mount path.
-  typedef std::map<std::string, FilePath> DeviceIdToMediaPathMap;
+  // Mapping of device id to media device info.
+  typedef std::map<std::string, base::SystemMonitor::MediaDeviceInfo>
+      DeviceIdToInfoMap;
 
   // Obtain an instance of this class via GetInstance().
   MediaFileSystemRegistry();
   virtual ~MediaFileSystemRegistry();
 
   // Helper functions to register / unregister listening for renderer process
   // closed / terminiated notifications.
   void RegisterForRPHGoneNotifications(const content::RenderProcessHost* rph);
   void UnregisterForRPHGoneNotifications(const content::RenderProcessHost* rph);
 
   // Registers a path as a media file system and return the filesystem id.
-  std::string RegisterPathAsFileSystem(const FilePath& path);
+  std::string RegisterPathAsFileSystem(

[Lei Zhang, 2012/08/01 03:06:30]

Can we do (type, path) instead? Same order as struct MediaDeviceInfo and
OnMediaDeviceAttached().

[kmadhusu, 2012/08/01 23:39:35]

Done.

+      const FilePath& path,
+      const base::SystemMonitor::MediaDeviceType& type);
 
   // Revoke a media file system with a given |path|.
   void RevokeMediaFileSystem(const FilePath& path);
 
   // Only accessed on the UI thread.
   ChildIdToMediaFSMap media_fs_map_;
 
   // Only accessed on the UI thread.
-  DeviceIdToMediaPathMap device_id_map_;
+  DeviceIdToInfoMap device_id_map_;
 
   // Is only used on the UI thread.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaFileSystemRegistry);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERY_MEDIA_FILE_SYSTEM_REGISTRY_H_