clovis: Enable the disable-by-default-blink.debug.layout tracing category.

tools/android/loading/user_satisfied_lens_unittest.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import unittest
 
 import request_track
 import test_utils
 import user_satisfied_lens
 
@@ skipping 96 matching lines @@
                            'LayoutObjectsThatHadNeverHadLayout': 12
                        } } },
                       {'ts': 15 * self.MILLI_TO_MICRO, 'ph': 'I',
                        'cat': 'foobar', 'name': 'biz',
                        'args': {'counters': {
                            'LayoutObjectsThatHadNeverHadLayout': 10
                        } } } ])
     lens = user_satisfied_lens.FirstSignificantPaintLens(loading_trace)
     self.assertEqual(set(['0.1', '0.2']), lens.CriticalRequests())
     self.assertEqual(7, lens.PostloadTimeMsec())
+
+
+if __name__ == '__main__':
+  unittest.main()