Stop refcounting URLRequestContext.

net/url_request/url_request_context_builder.h

 // 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.
 
 // This class is useful for building a simple URLRequestContext. Most creators
 // of new URLRequestContexts should use this helper class to construct it. Call
 // any configuration params, and when done, invoke Build() to construct the
 // URLRequestContext. This URLRequestContext will own all its own storage.
 //
 // URLRequestContextBuilder and its associated params classes are initially
@@ skipping 73 matching lines @@
 
   // By default it's disabled.
   void set_ftp_enabled(bool enable) {
     ftp_enabled_ = enable;
   }
 
   // By default HttpCache is enabled with a default constructed HttpCacheParams.
   void EnableHttpCache(const HttpCacheParams& params);
   void DisableHttpCache();
 
-  scoped_refptr<URLRequestContext> Build();
+  URLRequestContext* Build();
 
  private:
   std::string user_agent_;
   bool ftp_enabled_;
   HostResolverParams host_resolver_params_;
   bool http_cache_enabled_;
   HttpCacheParams http_cache_params_;
 #if defined(OS_LINUX)
   scoped_ptr<ProxyConfigService> proxy_config_service_;
 #endif  // defined(OS_LINUX)
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextBuilder);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_CONTEXT_BUILDER_H_