web_dev_style: Fix errors in new directories and enable PRESUBMIT

tools/web_dev_style/js_checker.py

 # Copyright (c) 2012 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.
 
 """Presubmit script for Chromium JS resources.
 
 See chrome/browser/PRESUBMIT.py
 """
 
 import regex_check
@@ skipping 75 matching lines @@
        highlight the corresponding part of a string.
     """
     return start * ' ' + length * '^'
 
   def RunChecks(self):
     """Check for violations of the Chromium JavaScript style guide. See
        https://chromium.googlesource.com/chromium/src/+/master/styleguide/web/web.md#JavaScript
     """
     results = []
 
-    affected_files = self.input_api.change.AffectedFiles(
-        file_filter=self.file_filter,
-        include_deletes=False)
+    affected_files = self.input_api.AffectedFiles(file_filter=self.file_filter,
+                                                  include_deletes=False)
     affected_js_files = filter(lambda f: f.LocalPath().endswith('.js'),
                                affected_files)
     for f in affected_js_files:
       error_lines = []
 
       for i, line in enumerate(f.NewContents(), start=1):
         error_lines += filter(None, [
             self.ChromeSendCheck(i, line),
             self.CommentIfAndIncludeCheck(i, line),
             self.ConstCheck(i, line),
@@ skipping 11 matching lines @@
             'Found JavaScript style violations in %s:' %
             f.LocalPath()] + error_lines
         results.append(self.output_api.PresubmitError('\n'.join(error_lines)))
 
     if results:
       results.append(self.output_api.PresubmitNotifyResult(
           'See the JavaScript style guide at '
           'https://chromium.googlesource.com/chromium/src/+/master/styleguide/web/web.md#JavaScript'))
 
     return results