make ProxyService::CreateSystemProxyConfigService return scoped_ptrs

chrome/browser/net/proxy_service_factory.h

 // Copyright (c) 2011 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 CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
 class PrefProxyConfigTracker;
 class PrefService;
 
 namespace base {
 class CommandLine;
 }
 
 namespace net {
 class NetLog;
 class NetworkDelegate;
 class ProxyConfigService;
 class ProxyService;
 class URLRequestContext;
 }
 
 class ProxyServiceFactory {
  public:
   // Creates a ProxyConfigService that delivers the system preferences
   // (or the respective ChromeOS equivalent).
-  static net::ProxyConfigService* CreateProxyConfigService(
+  static scoped_ptr<net::ProxyConfigService> CreateProxyConfigService(
       PrefProxyConfigTracker* tracker);
 
   // Creates a PrefProxyConfigTracker that tracks preferences of a
   // profile. On ChromeOS it additionaly tracks local state for shared proxy
   // settings. This tracker should be used if the profile's preferences should
   // be respected. On ChromeOS's signin screen this is for example not the case.
   static PrefProxyConfigTracker* CreatePrefProxyConfigTrackerOfProfile(
       PrefService* profile_prefs,
       PrefService* local_state_prefs);
 
   // Creates a PrefProxyConfigTracker that tracks local state only. This tracker
   // should be used for the system request context and the signin screen
   // (ChromeOS only).
   static PrefProxyConfigTracker* CreatePrefProxyConfigTrackerOfLocalState(
       PrefService* local_state_prefs);
 
   // Create a proxy service according to the options on command line.
   static scoped_ptr<net::ProxyService> CreateProxyService(
       net::NetLog* net_log,
       net::URLRequestContext* context,
       net::NetworkDelegate* network_delegate,
-      net::ProxyConfigService* proxy_config_service,
+      scoped_ptr<net::ProxyConfigService> proxy_config_service,
       const base::CommandLine& command_line,
       bool quick_check_enabled);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ProxyServiceFactory);
 };
 
 #endif  // CHROME_BROWSER_NET_PROXY_SERVICE_FACTORY_H_