Don't issue presubmit warning for use of wstrings in Windows-only files.

BUG=none
TEST=none
[email protected]

Review URL: https://chromiumcodereview.appspot.com/22338004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@220415 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 7f4af43..cefb599 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -309,7 +309,7 @@
   problems = []
   for f in input_api.AffectedFiles():
     if (not f.LocalPath().endswith(('.cc', '.h')) or
-        f.LocalPath().endswith('test.cc')):
+        f.LocalPath().endswith(('test.cc', '_win.cc', '_win.h'))):
       continue
 
     allowWString = False