Add NOEXPORT=true commit message whenever import script is run.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/deps_updater_unittest.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/deps_updater_unittest.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/deps_updater_unittest.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/deps_updater_unittest.py
index f5524feb6e7b9a644da99a85084e414c6cd6528d..504d8a08b3fbd679d8345e0d010772643ffaf0c7 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/deps_updater_unittest.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/deps_updater_unittest.py
@@ -75,7 +75,9 @@ class DepsUpdaterTest(unittest.TestCase):
         updater = DepsUpdater(MockHost())
         self.assertEqual(
             updater._commit_message('aaaa', '1111'),
-            'Import 1111\n\nUsing update-w3c-deps in Chromium aaaa.\n\n')
+            'Import 1111\n\n'
+            'Using update-w3c-deps in Chromium aaaa.\n\n'
+            'NOEXPORT=true')
 
     def test_cl_description_with_empty_environ(self):
         host = MockHost()