Preserving target file name in the save as dialog if target directory doesn't exist.

chrome/browser/resources/file_manager/js/file_manager.js

 // Copyright (c) 2012 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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 1290 matching lines @@
         this.dialogType == DialogType.FULL_PAGE;
 
     if (PathUtil.getRootType(path) === RootType.GDATA) {
       var tracker = this.directoryModel_.createDirectoryChangeTracker();
       // Expected finish of setupPath to GData.
       tracker.exceptInitialChange = true;
       tracker.start();
       if (!this.isGDataEnabled()) {
         if (pageLoading)
           this.show_();
-        this.directoryModel_.setupDefaultPath();
+        var leafName = path.substr(path.indexOf('/') + 1);
+        path = this.directoryModel_.getDefaultDirectory() + '/' + leafName;
+        this.finishSetupCurrentDirectory_(path, invokeHandlers);
         return;
       }
       var gdataPath = RootDirectory.GDATA;
       if (this.volumeManager_.isMounted(gdataPath)) {
         this.finishSetupCurrentDirectory_(path, invokeHandlers);
         return;
       }
       if (pageLoading)
         this.delayShow_(500);
       // Reflect immediatelly in the UI we are on GData and display
@@ skipping 2054 matching lines @@
     return this.directoryModel_.getFileList();
   };
 
   /**
    * @return {cr.ui.List} Current list object.
    */
   FileManager.prototype.getCurrentList = function() {
     return this.currentList_;
   };
 })();