The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55

commit f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55
Author: Quinten Yearsley <qyearsley@google.com>
Date: Tue Aug 22 19:41:17 2017

Simplify Port.skips_test to not require two TestExpectations objects.

Bug:  757507 
Change-Id: I9489870e12d9e8217cd68382d1c0924d0dc1ce4c
Reviewed-on: https://chromium-review.googlesource.com/623920
Commit-Queue: Quinten Yearsley <qyearsley@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496408}
[modify] https://crrev.com/f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py
[modify] https://crrev.com/f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base_unittest.py
[modify] https://crrev.com/f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/copy_existing_baselines.py
[modify] https://crrev.com/f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/rebaseline.py
[modify] https://crrev.com/f54df3a17d0f3fa4ee53cdee3ff92d4fa7c66e55/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_expectations_updater.py