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

components/leveldb/leveldb_service_impl.h

Index: components/leveldb/leveldb_service_impl.h
diff --git a/components/leveldb/leveldb_service_impl.h b/components/leveldb/leveldb_service_impl.h
index 910a8d58674fff76ea43acf8e81afe083551bcf7..60b59805ec5efea180649cd4ac6dc7aa57332ef5 100644
--- a/components/leveldb/leveldb_service_impl.h
+++ b/components/leveldb/leveldb_service_impl.h
@@ -19,12 +19,12 @@ class LevelDBServiceImpl : public LevelDBService {
   ~LevelDBServiceImpl() override;
 
   // Overridden from LevelDBService:
-  void Open(filesystem::DirectoryPtr directory,
+  void Open(filesystem::mojom::DirectoryPtr directory,
             const mojo::String& dbname,
             leveldb::LevelDBDatabaseRequest database,
             const OpenCallback& callback) override;
   void OpenWithOptions(leveldb::OpenOptionsPtr open_options,
-                       filesystem::DirectoryPtr directory,
+                       filesystem::mojom::DirectoryPtr directory,
                        const mojo::String& dbname,
                        leveldb::LevelDBDatabaseRequest database,
                        const OpenCallback& callback) override;