| Index: chrome/browser/resources/PRESUBMIT.py | 
| diff --git a/chrome/browser/resources/PRESUBMIT.py b/chrome/browser/resources/PRESUBMIT.py | 
| index 05fc9cd8cab5aa3cd1a71fff0261d184f3484a67..b523d6bec85b28be3066e1f7454f3ecc3880ec05 100644 | 
| --- a/chrome/browser/resources/PRESUBMIT.py | 
| +++ b/chrome/browser/resources/PRESUBMIT.py | 
| @@ -107,7 +107,7 @@ def _CheckWebDevStyle(input_api, output_api): | 
|  | 
| try: | 
| import sys | 
| -    old_sys_path = sys.path | 
| +    old_sys_path = sys.path[:] | 
| cwd = input_api.PresubmitLocalPath() | 
| sys.path += [input_api.os_path.join(cwd, '..', '..', '..', 'tools')] | 
| import web_dev_style.presubmit_support | 
|  |