MD WebUI: add node{,_modules}.py as inputs to vulcanize() GN rules

chrome/browser/resources/vulcanize.gni

 # Copyright 2017 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.
 
 template("vulcanize") {
   action(target_name) {
     script = "//chrome/browser/resources/vulcanize_gn.py"
 
     # Declare dependencies to all involved tools.
     inputs = [
       "//chrome/browser/resources/unpack_pak.py",
+      "//third_party/node/node.py",
+      "//third_party/node/node_modules.py",
       "//third_party/node/node_modules.tar.gz.sha1",
     ]
 
     if (is_linux) {
       inputs += [ "//third_party/node/linux/node-linux-x64.tar.gz.sha1" ]
     }
     if (is_win) {
       inputs += [ "//third_party/node/win/node.exe.sha1" ]
     }
     if (is_mac) {
@@ skipping 25 matching lines @@
       invoker.input,
       "--insert_in_head",
       invoker.insert_in_head,
       "--out_folder",
       rebase_path(target_gen_dir, root_build_dir),
       "--depfile",
       rebase_path(depfile, root_build_dir),
     ]
   }
 }