Convert //components/proximity_auth from scoped_ptr to std::unique_ptr

components/proximity_auth/proximity_auth_pref_manager.h

 // Copyright 2015 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_PROXIMITY_AUTH_PROXIMITY_AUTH_PREF_MANAGER_H
 #define COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_PREF_MANAGER_H
 
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 class PrefRegistrySimple;
 class PrefService;
 
 namespace base {
 class DictionaryValue;
 }  // namespace base
 
 namespace proximity_auth {
 
@@ skipping 42 matching lines @@
   // Contains perferences that outlive the lifetime of this object and across
   // process restarts. Not owned and must outlive this instance.
   PrefService* pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ProximityAuthPrefManager);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_PREF_MANAGER_H