make ProxyService::CreateSystemProxyConfigService return scoped_ptrs NOT FOR REVIEW

chrome/service/net/service_url_request_context_getter.cc

 // 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.
 
 #include "chrome/service/net/service_url_request_context_getter.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <sys/utsname.h>
 #endif
 
@@ skipping 79 matching lines @@
                       BuildOSCpuInfo().c_str());
   return user_agent;
 }
 
 }  // namespace
 
 ServiceURLRequestContextGetter::ServiceURLRequestContextGetter()
     : user_agent_(MakeUserAgentForServiceProcess()),
       network_task_runner_(g_service_process->io_task_runner()) {
   DCHECK(g_service_process);
-  proxy_config_service_.reset(net::ProxyService::CreateSystemProxyConfigService(
+  proxy_config_service_ = net::ProxyService::CreateSystemProxyConfigService(
       g_service_process->io_task_runner(),
-      g_service_process->file_task_runner()));
+      g_service_process->file_task_runner());
 }
 
 net::URLRequestContext*
 ServiceURLRequestContextGetter::GetURLRequestContext() {
   if (!url_request_context_.get()) {
     net::URLRequestContextBuilder builder;
     builder.set_user_agent(user_agent_);
     builder.set_accept_language("en-us,fr");
     builder.set_proxy_config_service(proxy_config_service_.Pass());
     builder.set_throttling_enabled(true);
     url_request_context_ = builder.Build().Pass();
   }
   return url_request_context_.get();
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 ServiceURLRequestContextGetter::GetNetworkTaskRunner() const {
   return network_task_runner_;
 }
 
 ServiceURLRequestContextGetter::~ServiceURLRequestContextGetter() {}