Remove stl_util's deletion function use from ui/.

ui/wm/core/transient_window_manager.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/wm/core/transient_window_manager.h"
 
 #include <algorithm>
 #include <functional>
 
 #include "base/auto_reset.h"
-#include "base/stl_util.h"
 #include "ui/aura/client/transient_window_client_observer.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/aura/window_tracker.h"
 #include "ui/wm/core/transient_window_controller.h"
 #include "ui/wm/core/transient_window_observer.h"
 #include "ui/wm/core/transient_window_stacking_client.h"
 #include "ui/wm/core/window_util.h"
 
 using aura::Window;
@@ skipping 202 matching lines @@
   // RootWindow).
   if (transient_parent_) {
     TransientWindowManager::Get(transient_parent_)->RemoveTransientChild(
         window_);
   }
 
   // Destroy transient children, only after we've removed ourselves from our
   // parent, as destroying an active transient child may otherwise attempt to
   // refocus us.
   Windows transient_children(transient_children_);
-  base::STLDeleteElements(&transient_children);
+  for (auto* child : transient_children)
+    delete child;
   DCHECK(transient_children_.empty());
 }
 
 }  // namespace wm