When uploading updates to baselines/expectations, pass patchset title with "-t".

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

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py
index 53bf10fe61ba5e4324bc8e5e666681460ce25a83..de0dd3a1ac25cc815f1de27a2c038aafea6f5e5e 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer.py
@@ -429,7 +429,7 @@ class TestImporter(object):
         expectation_updater.run(args=[])
         message = 'Update test expectations and baselines.'
         self.check_run(['git', 'commit', '-a', '-m', message])
-        self.git_cl.run(['upload', '-m', message, '--gerrit'])
+        self.git_cl.run(['upload', '-t', message, '--gerrit'])

[tandrii(chromium), 2017/03/02 14:49:28]

this will work for re-upload, but for initial upload. For now, you'd need to do
smth like:
 if git_cl.run('issue'):
   git_cl.run(['upload', '-t', message, '--gerrit'])
 else:
   git_cl.run(['upload', '-m', message, '--gerrit'])

 
     def update_all_test_expectations_files(self, deleted_tests, renamed_tests):
         """Updates all test expectations files for tests that have been deleted or renamed."""