Reland "Mandoline filesystem: Build the filesystem on windows."

components/filesystem/public/interfaces/directory.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;
 
 import "components/filesystem/public/interfaces/file.mojom";
 import "components/filesystem/public/interfaces/types.mojom";
 
 // This interface provides access to a directory in a "file system", providing
 // operations such as creating/opening/removing/renaming files/directories
 // within it. Note that all relative |path| arguments are relative to "this"
 // directory (i.e., "this" directory functions as the current working directory
 // for the various operations).
 // TODO(vtl): Paths may be relative; should they allowed to be absolute?
 // (Currently not.)
 interface Directory {
   // Operations about "this" |Directory|:
 
   // Reads the contents of this directory.
   // TODO(vtl): Clarify error codes versus |directory_contents|.
-  Read() => (Error error, array<DirectoryEntry>? directory_contents);
+  Read() => (FileError error, array<DirectoryEntry>? directory_contents);
 
   // Operations *in* "this" |Directory|:
 
   // Opens the file specified by |path| with the given |open_flags|. |file| is
   // optional, mainly for consistency with |OpenDirectory()| (but may be useful,
   // together with |kOpenFlagCreate|, for "touching" a file).
   OpenFile(string path, File&? file, uint32 open_flags)
-      => (Error error);
+      => (FileError error);
 
   // Opens the directory specified by |path|. |directory| is optional, so that
   // this may be used as a simple "mkdir()" with |kOpenFlagCreate|.
   OpenDirectory(string path,
                 Directory&? directory,
-                uint32 open_flags) => (Error error);
+                uint32 open_flags) => (FileError error);
 
   // Renames/moves the file/directory given by |path| to |new_path|.
-  Rename(string path, string new_path) => (Error error);
+  Rename(string path, string new_path) => (FileError error);
 
   // Deletes the given path, which may be a file or a directory (see
   // |kDeleteFlag...| for details).
-  Delete(string path, uint32 delete_flags) => (Error error);
+  Delete(string path, uint32 delete_flags) => (FileError error);
 
   // TODO(vtl): directory "streaming"?
   // TODO(vtl): "make root" (i.e., prevent cd-ing, etc., to parent); note that
   // this would require a much more complicated implementation (e.g., it needs
   // to be "inherited" by OpenDirectory(), and the enforcement needs to be valid
   // even if the opened directory is subsequently moved -- e.g., closer to the
   // "root")
   // TODO(vtl): Add a "watch"?
 };