Remove use of stl_util in search_engines.

components/search_engines/default_search_policy_handler.h

 // 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.
 
 #ifndef COMPONENTS_SEARCH_ENGINES_DEFAULT_SEARCH_POLICY_HANDLER_H_
 #define COMPONENTS_SEARCH_ENGINES_DEFAULT_SEARCH_POLICY_HANDLER_H_
 
+#include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "components/policy/core/browser/configuration_policy_handler.h"
 
 namespace policy {
 
 // ConfigurationPolicyHandler for the DefaultSearchEncodings policy.
 class DefaultSearchEncodingsPolicyHandler
     : public TypeCheckingPolicyHandler {
@@ skipping 45 matching lines @@
 
   // Make sure that the |path| is present in |prefs_|.  If not, set it to
   // a blank string.
   void EnsureStringPrefExists(PrefValueMap* prefs, const std::string& path);
 
   // Make sure that the |path| is present in |prefs_| and is a ListValue.  If
   // not, set it to an empty list.
   void EnsureListPrefExists(PrefValueMap* prefs, const std::string& path);
 
   // The ConfigurationPolicyHandler handlers for each default search policy.
-  std::vector<TypeCheckingPolicyHandler*> handlers_;
+  std::vector<std::unique_ptr<TypeCheckingPolicyHandler>> handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultSearchPolicyHandler);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_SEARCH_ENGINES_DEFAULT_SEARCH_POLICY_HANDLER_H_