Migrates legacy packaged app data when it's upgraded to a platform app

storage/browser/fileapi/sandbox_file_system_backend_delegate.h

 // Copyright 2013 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.
 
 #ifndef STORAGE_BROWSER_FILEAPI_SANDBOX_FILE_SYSTEM_BACKEND_DELEGATE_H_
 #define STORAGE_BROWSER_FILEAPI_SANDBOX_FILE_SYSTEM_BACKEND_DELEGATE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 156 matching lines @@
   // Registers quota observer for file updates on filesystem of |type|.
   void RegisterQuotaUpdateObserver(FileSystemType type);
 
   void InvalidateUsageCache(const GURL& origin_url,
                             FileSystemType type);
   void StickyInvalidateUsageCache(const GURL& origin_url,
                                   FileSystemType type);
 
   void CollectOpenFileSystemMetrics(base::File::Error error_code);
 
+  // Used for migrating from the general storage partition to an isolated
+  // storage partition
+  void CopyFileSystem(const GURL& origin_url,
+                      FileSystemType type,
+                      SandboxFileSystemBackendDelegate* destination);
+
   base::SequencedTaskRunner* file_task_runner() {
     return file_task_runner_.get();
   }
 
   AsyncFileUtil* file_util() { return sandbox_file_util_.get(); }
   FileSystemUsageCache* usage_cache() { return file_system_usage_cache_.get(); }
   SandboxQuotaObserver* quota_observer() { return quota_observer_.get(); }
 
   storage::SpecialStoragePolicy* special_storage_policy() {
     return special_storage_policy_.get();
@@ skipping 63 matching lines @@
   base::Time next_release_time_for_open_filesystem_stat_;
 
   base::WeakPtrFactory<SandboxFileSystemBackendDelegate> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SandboxFileSystemBackendDelegate);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_SANDBOX_FILE_SYSTEM_BACKEND_DELEGATE_H_