[WebUI] Make CSS presubmit play nice with grit XML.

chrome/browser/resources/PRESUBMIT.py

Index: chrome/browser/resources/PRESUBMIT.py
diff --git a/chrome/browser/resources/PRESUBMIT.py b/chrome/browser/resources/PRESUBMIT.py
index 292836a15b5e832f6bdcfb95e8110f2ab67a3b25..846c40e4957a9ab4a2c9ac8dde5a41552f1dbe48 100644
--- a/chrome/browser/resources/PRESUBMIT.py
+++ b/chrome/browser/resources/PRESUBMIT.py
@@ -25,8 +25,14 @@ def _CommonChecks(input_api, output_api):
   resources = input_api.PresubmitLocalPath()
 
   path = input_api.os_path
-  presubmit = path.join(resources, 'PRESUBMIT.py')
-  if presubmit in (f.AbsoluteLocalPath() for f in input_api.AffectedFiles()):
+  affected_files = (f.AbsoluteLocalPath() for f in input_api.AffectedFiles())
+  would_affect_tests = (
+      path.join(resources, 'PRESUBMIT.py'),
+      path.join(resources, 'test_presubmit.py'),
+      path.join(resources, 'web_dev_style', 'css_checker.py'),
+      path.join(resources, 'web_dev_style', 'js_checker.py'),
+  )
+  if filter(lambda t: t in affected_files, would_affect_tests):

[Dirk Pranke, 2012/03/22 03:05:30]

nit: I'd probably do if any(f for f in affected_files if f in
would_affect_tests)

[Dan Beam, 2012/03/22 03:19:31]

Done. (I have little to no idea what I just did though, I'll regard it as magic)

     tests = [path.join(resources, 'test_presubmit.py')]
     results.extend(
         input_api.canned_checks.RunUnitTests(input_api, output_api, tests))