Clear the host cache when closing the last incognito window....

chrome/browser/net/dns_global.h

 // 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.
 
 // This is the global interface for the dns prefetch services.  It centralizes
 // initialization, along with all the callbacks etc. to connect to the browser
 // process.  This allows the more standard DNS prefetching services, such as
 // provided by DnsMaster to be left as more generally usable code, and possibly
 // be shared across multiple client projects.
 
@@ skipping 39 matching lines @@
 void RegisterUserPrefs(PrefService* user_prefs);
 // Renderer bundles up list and sends to this browser API via IPC.
 void DnsPrefetchList(const NameList& hostnames);
 // This API is used by the autocomplete popup box (as user types).
 void DnsPrefetchUrl(const GURL& url);
 void DnsPrefetchGetHtmlInfo(std::string* output);
 
 //------------------------------------------------------------------------------
 void SaveDnsPrefetchStateForNextStartupAndTrim(PrefService* prefs);
 // Helper class to handle global init and shutdown.
-class DnsPrefetcherInit {
+class DnsGlobalInit {
  public:
   // Too many concurrent lookups negate benefits of prefetching by trashing
   // the OS cache before all resource loading is complete.
   // This is the default.
-  static const size_t kMaxConcurrentLookups;
+  static const size_t kMaxPrefetchConcurrentLookups;
 
   // When prefetch requests are queued beyond some period of time, then the
   // system is congested, and we need to clear all queued requests to get out
   // of that state.  The following is the suggested default time limit.
-  static const int kMaxQueueingDelayMs;
+  static const int kMaxPrefetchQueueingDelayMs;
 
-  DnsPrefetcherInit(PrefService* user_prefs, PrefService* local_state);
-  ~DnsPrefetcherInit();
+  DnsGlobalInit(PrefService* user_prefs, PrefService* local_state);
+  ~DnsGlobalInit();
 
  private:
   // Maintain a field trial instance when we do A/B testing.
   scoped_refptr<FieldTrial> trial_;
 
-  DISALLOW_COPY_AND_ASSIGN(DnsPrefetcherInit);
+  DISALLOW_COPY_AND_ASSIGN(DnsGlobalInit);
 };
 
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_DNS_GLOBAL_H_