Browser freezes when adding new incognito tab after removing it

When do layout, the position of new tab may be changed since other tab
closed, we need to get the position again at the time.

Change-Id: Ia5bcc15a0074678f401d6b3e93026e5ef5d2af7d
Author: weiweix.ji <weiweix.ji@intel.com>
Signed-off-by: Xiaokang Qin <xiaokang.qin@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 66643