Remove use of stl_util in search_engines.

ios/chrome/browser/search_engines/search_engines_util.cc

 // Copyright 2012 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 "ios/chrome/browser/search_engines/search_engines_util.h"
 
 #include <stddef.h>
 
 #include "base/location.h"
+#include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/prefs/pref_service.h"
 #include "components/search_engines/search_engines_pref_names.h"
 #include "components/search_engines/template_url_prepopulate_data.h"
 #include "components/search_engines/template_url_service.h"
 #include "components/search_engines/template_url_service_observer.h"
 
 namespace {
 
@@ skipping 25 matching lines @@
       service->SetUserSelectedDefaultSearchProvider(engine);
   }
   for (auto* engine : old_engines) {
     if (engine->prepopulate_id() != kGoogleEnginePrepopulatedId)
       service->Remove(engine);
   }
   ScopedVector<TemplateURLData>::iterator it = new_engines.begin();
   while (it != new_engines.end()) {
     if ((*it)->prepopulate_id != kGoogleEnginePrepopulatedId) {
       // service->Add takes ownership on Added TemplateURL.
-      service->Add(new TemplateURL(**it));
+      service->Add(base::MakeUnique<TemplateURL>(**it));
       it = new_engines.weak_erase(it);
     } else {
       ++it;
     }
   }
 }
 
 // Observer class that allows to wait for the TemplateURLService to be loaded.
 // This class will delete itself as soon as the TemplateURLService is loaded.
 class LoadedObserver : public TemplateURLServiceObserver {
@@ skipping 42 matching lines @@
   // removed then the engines can be updated again.
   if (!service || service->is_default_search_managed())
     return;
   if (service->loaded())
     UpdateSearchEngine(service);
   else
     new LoadedObserver(service);  // The observer manages its own lifetime.
 }
 
 }  // namespace search_engines