ChangeState
ChangeState(Vertical(), Left(), Top(), State());
void ChangeState(bool vertical, bool left, bool top, int32 state,
fBarView->ChangeState(vertical, left, top, expand ? kExpandoState : kMiniState);
fBarView->ChangeState(vertical, left, top, expand ? kExpandoState : kMiniState);
fBarView->ChangeState(newVertical, newLeft, newTop, newState, true);