mandoline filesystem: add a sqlite3 vfs to proxy filesystem usage.

components/filesystem/public/interfaces/types.mojom

 // Copyright 2015 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.
 
 module filesystem;
 
 // Error codes used by the file system. These error codes line up exactly with
 // those of base::File.
 enum FileError {
   OK                =   0,
@@ skipping 59 matching lines @@
 const uint32 kFlagCreate = 0x2;
 // May create a new file.
 const uint32 kFlagOpenAlways = 0x4;
 // May overwrite an old file.
 const uint32 kCreateAlways = 0x8;
 // Opens a file and truncates it, only if it exists.
 const uint32 kFlagOpenTruncated = 0x10;
 const uint32 kFlagRead = 0x20;
 const uint32 kFlagWrite = 0x40;
 const uint32 kFlagAppend = 0x80;
+// Deletes the file when closed.
+const uint32 kDeleteOnClose = 0x2000;
 
 // File types.
 //
 // Note: This is named FsFileType because otherwise we have a name collision
 // with windows.h.
 enum FsFileType {
   UNKNOWN = 0,
   REGULAR_FILE,
   DIRECTORY,
 };
 
 // Describes a directory entry (i.e., a single member of a directory).
 struct DirectoryEntry {
   FsFileType type;
   string name;
 };
 
 // Deletion flags:
 // Recursively delete.
 const uint32 kDeleteFlagRecursive = 0x1;