components: Cleanup class/struct fwd declarations

components/filesystem/util.h

 // 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.
 
 #ifndef COMPONENTS_FILESYSTEM_UTIL_H_
 #define COMPONENTS_FILESYSTEM_UTIL_H_
 
 #include <stdint.h>
 
 #include "base/files/file.h"
 #include "components/filesystem/public/interfaces/types.mojom.h"
 
-namespace mojo {
-class String;
-}
-
 namespace filesystem {
 
 // Validation functions (typically used to check arguments; they return
 // |ERROR_OK| if valid, else the standard/recommended error for the validation
 // error):
 
 // Checks if |path| is (looks like) a valid (relative) path. (On failure,
 // returns |ERROR_INVALID_ARGUMENT| if |path| is not UTF-8, or
 // |ERROR_PERMISSION_DENIED| if it is not relative.)
 mojom::FileError IsPathValid(const std::string& path);
@@ skipping 17 matching lines @@
 mojom::FileInformationPtr MakeFileInformation(const base::File::Info& info);
 
 // Creates an absolute file path and ensures that we don't try to traverse up.
 mojom::FileError ValidatePath(const std::string& raw_path,
                               const base::FilePath& filesystem_base,
                               base::FilePath* out);
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_UTIL_H_