Refactorings surrounding HostResolver:...

chrome/browser/net/dns_global.cc

 // Copyright (c) 2006-2008 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/browser/net/dns_global.h"
 
 #include <map>
 #include <string>
 
 #include "base/singleton.h"
@@ skipping 458 matching lines @@
   if (!dns_master)
     return;
   dns_master->DiscardAllResults();
 }
 
 //------------------------------------------------------------------------------
 
 net::HostResolver* GetGlobalHostResolver() {
   // Called from UI thread.
   if (!global_host_resolver) {
-    static const size_t kMaxHostCacheEntries = 100;
-    static const size_t kHostCacheExpirationSeconds = 60;  // 1 minute.
-
-    global_host_resolver = new net::HostResolver(
-        kMaxHostCacheEntries, kHostCacheExpirationSeconds * 1000);
+    global_host_resolver = net::CreateSystemHostResolver();
   }
   return global_host_resolver;
 }
 
 //------------------------------------------------------------------------------
 // Functions to handle saving of hostnames from one session to the next, to
 // expedite startup times.
 
 void SaveHostNamesForNextStartup(PrefService* local_state) {
   if (!dns_prefetch_enabled)
@@ skipping 121 matching lines @@
   }
 }
 
 DnsPrefetcherInit::~DnsPrefetcherInit() {
     if (dns_master)
       FreeDnsPrefetchResources();
   }
 
 }  // namespace chrome_browser_net