Fix namespace for src/ui/display/.

ash/display/projecting_observer_chromeos.h

Index: ash/display/projecting_observer_chromeos.h
diff --git a/ash/display/projecting_observer_chromeos.h b/ash/display/projecting_observer_chromeos.h
index 86f21771d14512a89ef44cd4437c26d62c838b75..f7c46bf846a67af1408580a1fd758db9b866655f 100644
--- a/ash/display/projecting_observer_chromeos.h
+++ b/ash/display/projecting_observer_chromeos.h
@@ -16,8 +16,9 @@ class PowerManagerClient;
 
 namespace ash {
 
-class ASH_EXPORT ProjectingObserver : public ui::DisplayConfigurator::Observer,
-                                      public ShellObserver {
+class ASH_EXPORT ProjectingObserver
+    : public display::DisplayConfigurator::Observer,
+      public ShellObserver {
  public:
   // |power_manager_client| must outlive this object.
   explicit ProjectingObserver(
@@ -26,7 +27,7 @@ class ASH_EXPORT ProjectingObserver : public ui::DisplayConfigurator::Observer,
 
   // DisplayConfigurator::Observer implementation:
   void OnDisplayModeChanged(
-      const ui::DisplayConfigurator::DisplayStateList& outputs) override;
+      const display::DisplayConfigurator::DisplayStateList& outputs) override;
 
   // ash::ShellObserver implementation:
   void OnCastingSessionStartedOrStopped(bool started) override;