[blinkpy] Add NOAUTOREVERT to WPT import CLs

Prevent FindIt from auto-reverting import CLs.

Bug: 871392
Change-Id: If4fb4abfcbf0e1e7bf95b8272701031ccb96ee38
Reviewed-on: https://chromium-review.googlesource.com/1164030Reviewed-by: Chan Li <chanli@chromium.org>
Reviewed-by: Quinten Yearsley <qyearsley@chromium.org>
Commit-Queue: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581306}

third_party/blink/tools/blinkpy/w3c/test_importer.py

@@ -503,6 +503,9 @@ class TestImporter(object):
         if directory_owners:
             description += self._format_directory_owners(directory_owners) + '\n\n'
 
+        # Prevent FindIt from auto-reverting import CLs.
+        description += 'NOAUTOREVERT=true\n'
+
         # Move any No-Export tag to the end of the description.
         description = description.replace('No-Export: true', '')
         description = description.replace('\n\n\n\n', '\n\n')

third_party/blink/tools/blinkpy/w3c/test_importer_unittest.py

@@ -308,6 +308,7 @@ class TestImporterTest(LoggingTestCase):
             'lines to TestExpectations rather than reverting. See:\n'
             'https://chromium.googlesource.com'
             '/chromium/src/+/master/docs/testing/web_platform_tests.md\n\n'
+            'NOAUTOREVERT=true\n'
             'No-Export: true')
         self.assertEqual(host.executive.calls, [['git', 'log', '-1', '--format=%B']])