Clear DNS cache and passive log collected on incognito close.

chrome/browser/io_thread.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 #pragma once
 
 #include <string>
 
@@ skipping 88 matching lines @@
            ChromeNetLog* net_log,
            ExtensionEventRouterForwarder* extension_event_router_forwarder);
 
   virtual ~IOThread();
 
   // Can only be called on the IO thread.
   Globals* globals();
 
   ChromeNetLog* net_log();
 
+  // Handles changing to On The Record mode, discarding confidential data.
+  void ChangedToOnTheRecord();
+
   // Returns a getter for the URLRequestContext.  Only called on the UI thread.
   net::URLRequestContextGetter* system_url_request_context_getter();
 
   // Clears the host cache.  Intended to be used to prevent exposing recently
   // visited sites on about:net-internals/#dns and about:dns pages.  Must be
   // called on the IO thread.
   void ClearHostCache();
 
  private:
   // BrowserThreadDelegate implementation, runs on the IO thread.
@@ skipping 17 matching lines @@
   void InitSystemRequestContextOnIOThread();
 
   static void RegisterPrefs(PrefService* local_state);
 
   net::HttpAuthHandlerFactory* CreateDefaultAuthHandlerFactory(
       net::HostResolver* resolver);
 
   // Returns an SSLConfigService instance.
   net::SSLConfigService* GetSSLConfigService();
 
+  void ChangedToOnTheRecordOnIOThread();
+
   // The NetLog is owned by the browser process, to allow logging from other
   // threads during shutdown, but is used most frequently on the IOThread.
   ChromeNetLog* net_log_;
 
   // The ExtensionEventRouterForwarder allows for sending events to extensions
   // from the IOThread.
   ExtensionEventRouterForwarder* extension_event_router_forwarder_;
 
   // These member variables are basically global, but their lifetimes are tied
   // to the IOThread.  IOThread owns them all, despite not using scoped_ptr.
@@ skipping 33 matching lines @@
       system_url_request_context_getter_;
 
   net::SdchManager* sdch_manager_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_