FileSystem: Modify ObfucatedFileUtil to delete contents of the plugin private filesystem

storage/browser/fileapi/obfuscated_file_util.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.
 
 #ifndef STORAGE_BROWSER_FILEAPI_OBFUSCATED_FILE_UTIL_H_
 #define STORAGE_BROWSER_FILEAPI_OBFUSCATED_FILE_UTIL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 182 matching lines @@
       bool create,
       base::File::Error* error_code);
 
   // Deletes the topmost directory specific to this origin and type.  This will
   // delete its directory database.
   // Deletes the topmost origin directory if |type_string| is empty.
   bool DeleteDirectoryForOriginAndType(
       const GURL& origin,
       const std::string& type_string);
 
+  // Deletes all files and directories in all plugin private filesystems
+  // associated with |origin|.  And also deletes their directory databases from
+  // the database list.
+  bool DeleteOriginDirectoryForPluginPrivateFileSystem(const GURL& origin);
+
   // This method and all methods of its returned class must be called only on
   // the FILE thread.  The caller is responsible for deleting the returned
   // object.
   AbstractOriginEnumerator* CreateOriginEnumerator();
 
   // Deletes a directory database from the database list in the ObfuscatedFSFU
   // and destroys the database on the disk.
   bool DestroyDirectoryDatabase(const GURL& origin,
                                 const std::string& type_string);
 
@@ skipping 137 matching lines @@
 
   // Not owned.
   SandboxFileSystemBackendDelegate* sandbox_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ObfuscatedFileUtil);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_OBFUSCATED_FILE_UTIL_H_