Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/net/proxy_service_factory.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 IOS_CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_
 #define IOS_CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 class PrefProxyConfigTracker;
 class PrefService;
 
 namespace net {
 class NetLog;
 class NetworkDelegate;
 class ProxyConfigService;
 class ProxyService;
 class URLRequestContext;
 }
 
 namespace ios {
 
 class ProxyServiceFactory {
  public:
   // Creates a ProxyConfigService that delivers the system preferences.
-  static scoped_ptr<net::ProxyConfigService> CreateProxyConfigService(
+  static std::unique_ptr<net::ProxyConfigService> CreateProxyConfigService(
       PrefProxyConfigTracker* tracker);
 
   // Creates a PrefProxyConfigTracker that tracks browser state preferences.
-  static scoped_ptr<PrefProxyConfigTracker>
+  static std::unique_ptr<PrefProxyConfigTracker>
   CreatePrefProxyConfigTrackerOfProfile(PrefService* browser_state_prefs,
                                         PrefService* local_state_prefs);
 
   // Creates a PrefProxyConfigTracker that tracks local state only. This tracker
   // should be used for the system request context.
-  static scoped_ptr<PrefProxyConfigTracker>
+  static std::unique_ptr<PrefProxyConfigTracker>
   CreatePrefProxyConfigTrackerOfLocalState(PrefService* local_state_prefs);
 
   // Create a proxy service.
-  static scoped_ptr<net::ProxyService> CreateProxyService(
+  static std::unique_ptr<net::ProxyService> CreateProxyService(
       net::NetLog* net_log,
       net::URLRequestContext* context,
       net::NetworkDelegate* network_delegate,
-      scoped_ptr<net::ProxyConfigService> proxy_config_service,
+      std::unique_ptr<net::ProxyConfigService> proxy_config_service,
       bool quick_check_enabled);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ProxyServiceFactory);
 };
 
 }  // namespace ios
 
 #endif  // IOS_CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_