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

chrome/browser/tab_contents/tab_contents.cc

 // 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.
 
 #include "chrome/browser/tab_contents/tab_contents.h"
 
 #if defined(OS_CHROMEOS)
 // For GdkScreen
 #include <gdk/gdk.h>
 #endif  // defined(OS_CHROMEOS)
@@ skipping 2559 matching lines @@
     case ViewHostMsg_RunFileChooser_Params::OpenMultiple:
       dialog_type = SelectFileDialog::SELECT_OPEN_MULTI_FILE;
       break;
     case ViewHostMsg_RunFileChooser_Params::Save:
       dialog_type = SelectFileDialog::SELECT_SAVEAS_FILE;
       break;
     default:
       dialog_type = SelectFileDialog::SELECT_OPEN_FILE;  // Prevent warning.
       NOTREACHED();
   }
+  FilePath default_file_name = params.default_file_name;
+  if (default_file_name.empty())
+    default_file_name = profile()->last_selected_directory();
   select_file_dialog_->SelectFile(dialog_type, params.title,
-                                  params.default_file_name,
+                                  default_file_name,
                                   NULL, 0, FILE_PATH_LITERAL(""),
                                   view_->GetTopLevelNativeWindow(), NULL);
 }
 
 void TabContents::RunJavaScriptMessage(
     const std::wstring& message,
     const std::wstring& default_prompt,
     const GURL& frame_url,
     const int flags,
     IPC::Message* reply_msg,
@@ skipping 240 matching lines @@
 
 void TabContents::FocusedNodeChanged() {
   NotificationService::current()->Notify(
       NotificationType::FOCUS_CHANGED_IN_PAGE,
       Source<RenderViewHost>(render_view_host()),
       NotificationService::NoDetails());
 }
 
 void TabContents::FileSelected(const FilePath& path,
                                int index, void* params) {
+  profile()->set_last_selected_directory(path.DirName());
   std::vector<FilePath> files;
   files.push_back(path);
   render_view_host()->FilesSelectedInChooser(files);
 }
 
 void TabContents::MultiFilesSelected(const std::vector<FilePath>& files,
                                      void* params) {
+  if (!files.empty())
+    profile()->set_last_selected_directory(files[0].DirName());
   render_view_host()->FilesSelectedInChooser(files);
 }
 
 void TabContents::FileSelectionCanceled(void* params) {
   // If the user cancels choosing a file to upload we pass back an
   // empty vector.
   render_view_host()->FilesSelectedInChooser(std::vector<FilePath>());
 }
 
 void TabContents::BeforeUnloadFiredFromRenderManager(
@@ skipping 322 matching lines @@
   AddInfoBar(new SavePasswordInfoBarDelegate(this, form_to_save));
 }
 
 Profile* TabContents::GetProfileForPasswordManager() {
   return profile();
 }
 
 bool TabContents::DidLastPageLoadEncounterSSLErrors() {
   return controller().ssl_manager()->ProcessedSSLErrorFromRequest();
 }