Fix namespace for src/ui/display/.

ash/display/shutdown_observer_chromeos.h

Index: ash/display/shutdown_observer_chromeos.h
diff --git a/ash/display/shutdown_observer_chromeos.h b/ash/display/shutdown_observer_chromeos.h
index 934b012db6230c1f5af5c39d0fea58a3595ba7f4..454eb40ee01aac690b37b4387b0c6a458ba30584 100644
--- a/ash/display/shutdown_observer_chromeos.h
+++ b/ash/display/shutdown_observer_chromeos.h
@@ -8,7 +8,7 @@
 #include "ash/common/shell_observer.h"
 #include "base/macros.h"
 
-namespace ui {
+namespace display {
 class DisplayConfigurator;
 }
 
@@ -18,14 +18,14 @@ namespace ash {
 // |display_configurator_|.
 class ShutdownObserver : public ShellObserver {
  public:
-  explicit ShutdownObserver(ui::DisplayConfigurator* display_configurator);
+  explicit ShutdownObserver(display::DisplayConfigurator* display_configurator);
   ~ShutdownObserver() override;
 
  private:
   // ShellObserver:
   void OnAppTerminating() override;
 
-  ui::DisplayConfigurator* display_configurator_;
+  display::DisplayConfigurator* display_configurator_;
 
   DISALLOW_COPY_AND_ASSIGN(ShutdownObserver);
 };