1. The dismiss method in a PopupWindow is first removing the
popup View from the WindowManager and then if the content
View differs from the popup View the former is removed from
the latter. Then dismiss() clears the dismissed flag so a
subsequent call to dismiss() is a NOP. However, removing
a View both from the WindowManager and from its parent
ViewGroup triggers stuff wich may lead to a subsequent call
to dismiss(). This leads to a stack overflow exception.
bug:5598944
Change-Id: I2aeeda591be3e9aa98fec1ee17ea8f0e746e6992