Table Rowspan Row Height Less Than Content Height

Test for chromium bug : 406043. Negative row height when cell has percentage height.

| This is rowspan cell. It would span 3 rows in table. | This is first row second column. | | This is second row first column. But it should display as second column. | | This is third row first column. But it should display as second column. | | This is fourth row first column. But it should display as second column. |