web_dev_style: Fix errors in new directories and enable PRESUBMIT

tools/web_dev_style/presubmit_support.py

 # 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.
 
 
 import css_checker
 import html_checker
 import js_checker
 import resource_checker
 
 
-def CheckStyle(input_api, output_api):
+def CheckStyle(input_api, output_api, file_filter=lambda f: True):
   apis = input_api, output_api
   is_resource = lambda f: f.LocalPath().endswith(('.html', '.css', '.js'))
+  wrapped_filter = lambda f: file_filter(f) and is_resource(f)
   checkers = [
-      css_checker.CSSChecker(*apis, file_filter=is_resource),
-      html_checker.HtmlChecker(*apis, file_filter=is_resource),
-      js_checker.JSChecker(*apis, file_filter=is_resource),
-      resource_checker.ResourceChecker(*apis, file_filter=is_resource),
+      css_checker.CSSChecker(*apis, file_filter=wrapped_filter),
+      html_checker.HtmlChecker(*apis, file_filter=wrapped_filter),
+      js_checker.JSChecker(*apis, file_filter=wrapped_filter),
+      resource_checker.ResourceChecker(*apis, file_filter=wrapped_filter),
   ]
   results = []
   for checker in checkers:
     results.extend(checker.RunChecks())
   return results