ui: Use stl utilities from the base namespace

ui/arc/notification/arc_notification_manager_unittest.cc

Index: ui/arc/notification/arc_notification_manager_unittest.cc
diff --git a/ui/arc/notification/arc_notification_manager_unittest.cc b/ui/arc/notification/arc_notification_manager_unittest.cc
index 1df7f66633f632e7e5881f72671b3a74984cd342..3db70c1f5648db60a58862d21cc3f6c719ea8620 100644
--- a/ui/arc/notification/arc_notification_manager_unittest.cc
+++ b/ui/arc/notification/arc_notification_manager_unittest.cc
@@ -27,8 +27,8 @@ class MockMessageCenter : public message_center::FakeMessageCenter {
  public:
   MockMessageCenter() {}
   ~MockMessageCenter() override {
-    STLDeleteContainerPointers(
-        visible_notifications_.begin(), visible_notifications_.end());
+    base::STLDeleteContainerPointers(visible_notifications_.begin(),
+                                     visible_notifications_.end());
   }
 
   void AddNotification(