Link tests to related bug in TestExpectations

The following tests are failing on Mac because of crbug.com/983503:
* external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-size-select-elem-001.html
* external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-size-select-elem-002.html

BUG=983503

Change-Id: I71c33780fd04fd8c1f9bf37187f429ae303cf352
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1698398
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Commit-Queue: Manuel Rego <rego@igalia.com>
Cr-Commit-Position: refs/heads/master@{#676846}
1 file changed