Index: athena/wm/window_overview_mode.cc |
diff --git a/athena/wm/window_overview_mode.cc b/athena/wm/window_overview_mode.cc |
index b8b10314eb9cd03653d8b617e09cfbbad4bd9a59..4bcedbe5529a9a3885309dfb61750cb5dd231b5f 100644 |
--- a/athena/wm/window_overview_mode.cc |
+++ b/athena/wm/window_overview_mode.cc |
@@ -430,7 +430,8 @@ class WindowOverviewModeImpl : public WindowOverviewMode, |
targeter->FindTargetForLocatedEvent(container_, event)); |
while (target && target->parent() != container_) |
target = target->parent(); |
- aura::Window* transient_parent = wm::GetTransientParent(target); |
+ aura::Window* transient_parent = |
+ target ? wm::GetTransientParent(target) : NULL; |
return transient_parent ? transient_parent : target; |
} |