Add WPTEXPORT footer automatically in DepsUpdater and imported/PRESUBMIT

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 5ebfb63867b80b467d078e9b4af950fc2ebb3266..0e7ea0396cac1546a6782bdeb4b548eb1669f2ff 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
@@ -70,7 +70,8 @@ class DepsUpdaterTest(unittest.TestCase):
         self.assertEqual(
             description,
             ('Last commit message\n'
-             'TBR=qyearsley@chromium.org'))
+             'TBR=qyearsley@chromium.org\n'
+             'WPTEXPORT=false'))
         self.assertEqual(host.executive.calls, [['git', 'log', '-1', '--format=%B']])
 
     def test_cl_description_with_environ_variables(self):
@@ -85,5 +86,6 @@ class DepsUpdaterTest(unittest.TestCase):
             description,
             ('Last commit message\n'
              'Build: https://build.chromium.org/p/my.master/builders/b/builds/123\n\n'
-             'TBR=qyearsley@chromium.org'))
+             'TBR=qyearsley@chromium.org\n'
+             'WPTEXPORT=false'))
         self.assertEqual(host.executive.calls, [['git', 'log', '-1', '--format=%B']])