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

chrome/browser/browser.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/browser.h"
 
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 1560 matching lines @@
   UserMetrics::RecordAction(UserMetricsAction("OpenFile"), profile_);
 #if defined(OS_CHROMEOS)
   FileBrowseUI::OpenPopup(profile_,
                           "",
                           FileBrowseUI::kPopupWidth,
                           FileBrowseUI::kPopupHeight);
 #else
   if (!select_file_dialog_.get())
     select_file_dialog_ = SelectFileDialog::Create(this);
 
+  const FilePath directory = profile_->last_selected_directory();
+
   // TODO(beng): figure out how to juggle this.
   gfx::NativeWindow parent_window = window_->GetNativeHandle();
   select_file_dialog_->SelectFile(SelectFileDialog::SELECT_OPEN_FILE,
-                                  string16(), FilePath(),
+                                  string16(), directory,
                                   NULL, 0, FILE_PATH_LITERAL(""),
                                   parent_window, NULL);
 #endif
 }
 
 void Browser::OpenCreateShortcutsDialog() {
   UserMetrics::RecordAction(UserMetricsAction("CreateShortcut"), profile_);
 #if defined(OS_WIN) || defined(OS_LINUX)
   TabContents* current_tab = GetSelectedTabContents();
   DCHECK(current_tab && web_app::IsValidUrl(current_tab->GetURL())) <<
@@ skipping 1248 matching lines @@
       break;
   }
 
   pending_web_app_action_ = NONE;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, SelectFileDialog::Listener implementation:
 
 void Browser::FileSelected(const FilePath& path, int index, void* params) {
+  profile_->set_last_selected_directory(path.DirName());
   GURL file_url = net::FilePathToFileURL(path);
   if (!file_url.is_empty())
     OpenURL(file_url, GURL(), CURRENT_TAB, PageTransition::TYPED);
 }
 
 
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, NotificationObserver implementation:
 
 void Browser::Observe(NotificationType type,
@@ skipping 1054 matching lines @@
 }
 
 bool Browser::IsPinned(TabContents* source) {
   int index = tabstrip_model_.GetIndexOfTabContents(source);
   if (index == TabStripModel::kNoTab) {
     NOTREACHED() << "IsPinned called for tab not in our strip";
     return false;
   }
   return tabstrip_model_.IsTabPinned(index);
 }