Table Rowspan Wrong Height With Only Spanning Cells

Test for chromium bug : 396655. Tables with specific merge cell configuration render with extra height to tr elements.

We have the below table. Because cell A and cell D overlap in the second row, the height of the second row is the 1px difference between A and B and the 1px difference between C and D.

+-----+-----+

| | B |

| A +-----+

| | |

+-----+ D |

| C | |

+-----+-----+

| | | | | | |