Index: ash/wm/coordinate_conversion.cc |
diff --git a/ash/wm/coordinate_conversion.cc b/ash/wm/coordinate_conversion.cc |
index e6c956026e46f86b46c19a3b10f27c379107cbd4..467a1fc6c2ae184cab0b24d51caab34ef1456b36 100644 |
--- a/ash/wm/coordinate_conversion.cc |
+++ b/ash/wm/coordinate_conversion.cc |
@@ -19,6 +19,7 @@ namespace wm { |
aura::RootWindow* GetRootWindowAt(const gfx::Point& point) { |
const gfx::Display& display = |
Shell::GetScreen()->GetDisplayNearestPoint(point); |
+ DCHECK(display.is_valid()); |
// TODO(yusukes): Move coordinate_conversion.cc and .h to ui/aura/ once |
// GetRootWindowForDisplayId() is moved to aura::Env. |
return Shell::GetInstance()->display_controller()-> |