Bug 1450601: [BC] borders around cells of a 'position: sticky' or 'position: relative' table row are incorrectly drawn

Actual (live) results of 'border-collapse: collapse' table and 'position: sticky' row in your browser:

Actual (live) results of 'border-collapse: collapse' table and 'position: relative' row in your browser:

Expected results:

Chromium 64.0.3282.119 achieves expected results for both tests.