Split web_dev_style tests into separate files.

chrome/browser/PRESUBMIT.py

 # Copyright 2014 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 browser code.
 
 This script currently checks HTML/CSS/JS files in resources/ and ui/webui/.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools, and see
@@ skipping 13 matching lines @@
 def _CommonChecks(input_api, output_api):
   """Checks common to both upload and commit."""
   results = []
 
   path = input_api.os_path
   cwd = input_api.PresubmitLocalPath()
   resources = path.join(cwd, 'resources')
   webui = path.join(cwd, 'ui', 'webui')
 
   affected_files = (f.AbsoluteLocalPath() for f in input_api.AffectedFiles())
-  would_affect_tests = (
+
+  would_affect_tests = [
       path.join(cwd, 'PRESUBMIT.py'),
       path.join(cwd, 'test_presubmit.py'),
-      path.join(cwd, 'web_dev_style', 'css_checker.py'),
-      path.join(cwd, 'web_dev_style', 'html_checker.py'),
-      path.join(cwd, 'web_dev_style', 'js_checker.py'),
-  )
+  ]
+  would_affect_tests += input_api.glob(path.join(cwd, 'web_dev_style', '*.py'))
+
   if any(f for f in affected_files if f in would_affect_tests):
     tests = [path.join(cwd, 'test_presubmit.py')]
     results.extend(
         input_api.canned_checks.RunUnitTests(input_api, output_api, tests))
 
   import sys
   old_path = sys.path
 
   try:
     sys.path = [cwd] + old_path
@@ skipping 15 matching lines @@
     results.extend(css_checker.CSSChecker(
         input_api, output_api, file_filter=is_resource).RunChecks())
     results.extend(html_checker.HtmlChecker(
         input_api, output_api, file_filter=is_resource).RunChecks())
     results.extend(js_checker.JSChecker(
         input_api, output_api, file_filter=is_resource).RunChecks())
   finally:
     sys.path = old_path
 
   return results