GetReferenceWindow  218 ash/wm/window_positioner.cc   aura::Window* top_window = GetReferenceWindow(target, NULL, NULL);
GetReferenceWindow  260 ash/wm/window_positioner.cc   aura::Window* other_shown_window = GetReferenceWindow(
GetReferenceWindow  298 ash/wm/window_positioner.cc   aura::Window* other_shown_window = GetReferenceWindow(