Change media galleries to external file system type to add toURL support

chrome/browser/media_galleries/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_GALLERIES_MEDIA_FILE_SYSTEM_REGISTRY_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_FILE_SYSTEM_REGISTRY_H_
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/media_galleries/media_galleries_preferences.h"
 #include "components/storage_monitor/removable_storage_observer.h"
 
 class ExtensionGalleriesHost;
 class MediaFileSystemContext;
 class MediaGalleriesPreferences;
 class MediaScanManager;
@@ skipping 46 matching lines @@
   MediaFileSystemRegistry();
   virtual ~MediaFileSystemRegistry();
 
   // Passes to |callback| the list of media filesystem IDs and paths for a
   // given RVH.
   void GetMediaFileSystemsForExtension(
       const content::RenderViewHost* rvh,
       const extensions::Extension* extension,
       const MediaFileSystemsCallback& callback);
 
+  // Attempt to register the file system for |pref_id|. If |extension| does not
+  // have permission to |pref_id|, sends |callback| FILE_ERROR_NOT_FOUND.
+  void RegisterMediaFileSystemForExtension(
+      const content::RenderViewHost* rvh,
+      const extensions::Extension* extension,
+      MediaGalleryPrefId pref_id,
+      const base::Callback<void(base::File::Error result)>& callback);
+
   // Returns the media galleries preferences for the specified |profile|.
   // Caller is responsible for ensuring that the preferences are initialized
   // before use.
   MediaGalleriesPreferences* GetPreferences(Profile* profile);
 
   MediaScanManager* media_scan_manager();
 
   // RemovableStorageObserver implementation.
   virtual void OnRemovableStorageDetached(
       const storage_monitor::StorageInfo& info) OVERRIDE;
@@ skipping 10 matching lines @@
                    scoped_refptr<ExtensionGalleriesHost> > ExtensionHostMap;
   // Map a profile and extension to the ExtensionGalleriesHost.
   typedef std::map<Profile*, ExtensionHostMap> ExtensionGalleriesHostMap;
 
   virtual void OnPermissionRemoved(MediaGalleriesPreferences* pref,
                                    const std::string& extension_id,
                                    MediaGalleryPrefId pref_id) OVERRIDE;
   virtual void OnGalleryRemoved(MediaGalleriesPreferences* pref,
                                 MediaGalleryPrefId pref_id) OVERRIDE;
 
+  // Look up or create the extension gallery host.
+  ExtensionGalleriesHost* GetExtensionGalleryHost(
+      Profile* profile,
+      MediaGalleriesPreferences* preferences,
+      const std::string& extension_id);
+
   void OnExtensionGalleriesHostEmpty(Profile* profile,
                                      const std::string& extension_id);
 
   // This map owns all the ExtensionGalleriesHost objects created.
   ExtensionGalleriesHostMap extension_hosts_map_;
 
   scoped_ptr<MediaFileSystemContext> file_system_context_;
 
   scoped_ptr<MediaScanManager> media_scan_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaFileSystemRegistry);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_FILE_SYSTEM_REGISTRY_H_