Stop refcounting URLRequestContext.

chrome/service/net/service_url_request_context.cc

 // Copyright (c) 2012 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.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <sys/utsname.h>
 #endif
 
@@ skipping 152 matching lines @@
   // MessageLoopProxy* instead of MessageLoop*.
   DCHECK(g_service_process);
   proxy_config_service_.reset(
       net::ProxyService::CreateSystemProxyConfigService(
           g_service_process->io_thread()->message_loop(),
           g_service_process->file_thread()->message_loop()));
 }
 
 net::URLRequestContext*
 ServiceURLRequestContextGetter::GetURLRequestContext() {
-  if (!url_request_context_)
-    url_request_context_ =
+  if (!url_request_context_.get())
+    url_request_context_.reset(
         new ServiceURLRequestContext(user_agent_,
-                                     proxy_config_service_.release());
-  return url_request_context_;
+                                     proxy_config_service_.release()));
+  return url_request_context_.get();
 }
 
 scoped_refptr<base::MessageLoopProxy>
 ServiceURLRequestContextGetter::GetIOMessageLoopProxy() const {
   return io_message_loop_proxy_;
 }
 
 ServiceURLRequestContextGetter::~ServiceURLRequestContextGetter() {}