Don't save last used locations in open and save dialogs when in incognito mode.

chrome/browser/profile.h

 // Copyright (c) 2010 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 gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILE_H_
 #define CHROME_BROWSER_PROFILE_H_
 
 #include <set>
@@ skipping 398 matching lines @@
   virtual void MarkAsCleanShutdown() = 0;
 
   virtual void InitExtensions() = 0;
 
   // Start up service that gathers data from web resource feeds.
   virtual void InitWebResources() = 0;
 
   // Returns the new tab page resource cache.
   virtual NTPResourceCache* GetNTPResourceCache() = 0;
 
+  // Returns the last directory that was chosen for uploading or opening a file.
+  virtual FilePath last_selected_directory() = 0;
+  virtual void set_last_selected_directory(const FilePath& path) = 0;
+
 #ifdef UNIT_TEST
   // Use with caution.  GetDefaultRequestContext may be called on any thread!
   static void set_default_request_context(URLRequestContextGetter* c) {
     default_request_context_ = c;
   }
 #endif
 
   // Did the user restore the last session? This is set by SessionRestore.
   void set_restored_last_session(bool restored_last_session) {
     restored_last_session_ = restored_last_session;
@@ skipping 100 matching lines @@
   virtual TabRestoreService* GetTabRestoreService();
   virtual void ResetTabRestoreService();
   virtual SpellCheckHost* GetSpellCheckHost();
   virtual void ReinitializeSpellCheckHost(bool force);
   virtual WebKitContext* GetWebKitContext();
   virtual DesktopNotificationService* GetDesktopNotificationService();
   virtual void MarkAsCleanShutdown();
   virtual void InitExtensions();
   virtual void InitWebResources();
   virtual NTPResourceCache* GetNTPResourceCache();
+  virtual FilePath last_selected_directory();
+  virtual void set_last_selected_directory(const FilePath& path);
   virtual ProfileSyncService* GetProfileSyncService();
   void InitSyncService();
   virtual CloudPrintProxyService* GetCloudPrintProxyService();
   void InitCloudPrintProxyService();
 
   // NotificationObserver implementation.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
@@ skipping 115 matching lines @@
   scoped_refptr<history::TopSites> top_sites_;  // For history and thumbnails.
 
 #if defined(OS_CHROMEOS)
   chromeos::Preferences chromeos_preferences_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILE_H_