Use the most recently used download path when displaying a "save as" dialog....

chrome/browser/download/download_manager.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.
 //
 // The DownloadManager object manages the process of downloading, including
 // updates to the history system and providing the information for displaying
 // the downloads view in the Destinations tab. There is one DownloadManager per
 // active profile in Chrome.
 //
 // Each download is represented by a DownloadItem, and all DownloadItems
@@ skipping 348 matching lines @@
   void ShowDownloadInShell(const DownloadItem* download);
   void OpenDownloadInShell(const DownloadItem* download, HWND parent_window);
 
   // The number of in progress (including paused) downloads.
   int in_progress_count() const {
     return static_cast<int>(in_progress_.size());
   }
 
   std::wstring download_path() { return *download_path_; }
 
+  // Clears the last download path, used to initialize "save as" dialogs.  
+  void ClearLastDownloadPath();
+
   // Registers this file extension for automatic opening upon download
   // completion if 'open' is true, or prevents the extension from automatic
   // opening if 'open' is false.
   void OpenFilesOfExtension(const std::wstring& extension, bool open);
 
   // Tests if a file type should be opened automatically.
   bool ShouldOpenFileExtension(const std::wstring& extension);
 
   // Tests if we think the server means for this mime_type to be executable.
   static bool IsExecutableMimeType(const std::string& mime_type);
@@ skipping 15 matching lines @@
   // Deletes the specified path on the file thread.
   void DeleteDownload(const std::wstring& path);
 
   // Called when the user has validated the donwload of a dangerous file.
   void DangerousDownloadValidated(DownloadItem* download);
 
  private:
   // Shutdown the download manager.  This call is needed only after Init.
   void Shutdown();
 
+  // Determines whether the "save as" dialog should be displayed to the user
+  // when downloading a file.
+  bool ShouldDisplaySaveAsDialog(const DownloadCreateInfo* info);
+
   // Called on the download thread to check whether the suggested file path
   // exists.  We don't check if the file exists on the UI thread to avoid UI
   // stalls from interacting with the file system.
   void CheckIfSuggestedPathExists(DownloadCreateInfo* info);
 
   // Called on the UI thread once the DownloadManager has determined whether the
   // suggested file path exists.
   void OnPathExistenceAvailable(DownloadCreateInfo* info);
 
   // Called back after a target path for the file to be downloaded to has been
@@ skipping 137 matching lines @@
 
   // The "Save As" dialog box used to ask the user where a file should be
   // saved.
   scoped_refptr<SelectFileDialog> select_file_dialog_;
 
   DISALLOW_EVIL_CONSTRUCTORS(DownloadManager);
 };
 
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_H__