[net] Change factory methods for HostResolver and HostCache to return a scoped_ptr

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 12 matching lines @@
 #include "build/build_config.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 class ProxyConfigService;
 class URLRequestContext;
 
 class NET_EXPORT URLRequestContextBuilder {
  public:
-  struct NET_EXPORT HostResolverParams {
-    HostResolverParams();
-    ~HostResolverParams();
-
-    // The limit on the number of parallel host resolutions.
-    size_t parallelism;
-
-    // When the host resolution is taking too long, we'll retry this many times,
-    // in a backing off manner.
-    size_t retry_attempts;
-  };
-
   struct NET_EXPORT HttpCacheParams {
     enum Type {
       IN_MEMORY,
       DISK,
     };
 
     HttpCacheParams();
     ~HttpCacheParams();
 
     // The type of HTTP cache. Default is IN_MEMORY.
@@ skipping 13 matching lines @@
 #if defined(OS_LINUX)
   void set_proxy_config_service(ProxyConfigService* proxy_config_service);
 #endif  // defined(OS_LINUX)
 
   // Call this function to specify a hard-coded User-Agent for all requests that
   // don't have a User-Agent already set.
   void set_user_agent(const std::string& user_agent) {
     user_agent_ = user_agent;
   }
 
-  // Allows for overriding the default HostResolver params.
-  void set_host_resolver_params(
-      const HostResolverParams& host_resolver_params) {
-    host_resolver_params_ = host_resolver_params;
-  }
-
   // 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();
 
   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_