Pass a list of strings rather than a string-as-list.

This fixes a stupid bug that got past my testing (I tested the
positive case but not the negative).

[email protected]
NOTRY=true
BUG=None


Review URL: https://chromiumcodereview.appspot.com/11534010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@172328 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 3124dd7..b395233 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -667,7 +667,7 @@
     """
     return input_api.FilterSourceFile(
       affected_file,
-      white_list=('^(android_webview|base|content|net)[\\\/].*'),
+      white_list=(r'^(android_webview|base|content|net)[\\\/].*', ),
       black_list=(_EXCLUDED_PATHS +
                   _TEST_CODE_EXCLUDED_PATHS +
                   input_api.DEFAULT_BLACK_LIST))