Add mojom module suffix in .mojom files for components/filesystem.

services/user/public/interfaces/user_service.mojom

Index: services/user/public/interfaces/user_service.mojom
diff --git a/services/user/public/interfaces/user_service.mojom b/services/user/public/interfaces/user_service.mojom
index 45bf7072655e3c7327b31a359871dc662739154e..f1cf6337d07b07ba6ccef40501368253acbc3fc5 100644
--- a/services/user/public/interfaces/user_service.mojom
+++ b/services/user/public/interfaces/user_service.mojom
@@ -14,10 +14,10 @@ import "components/filesystem/public/interfaces/types.mojom";
 // the process so the only directory it has access to is the user's directory.
 interface UserService {
   // Returns the user profile directory.
-  GetDirectory(filesystem.Directory& dir) => ();
+  GetDirectory(filesystem.mojom.Directory& dir) => ();
 
   // Returns a subdirectory under the profile dir. Returns a filesystem error
   // when we fail to create the subdirectory.
-  GetSubDirectory(string dir_path, filesystem.Directory& dir)
-      => (filesystem.FileError err);
+  GetSubDirectory(string dir_path, filesystem.mojom.Directory& dir)
+      => (filesystem.mojom.FileError err);
 };