Fix dragging onto shortcuts in the volume list.

chrome/browser/resources/file_manager/foreground/js/file_transfer_controller.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.
 
 'use strict';
 
 /**
  * Global (placed in the window object) variable name to hold internal
  * file dragging information. Needed to show visual feedback while dragging
  * since DataTransfer object is in protected state. Reachable from other
@@ skipping 416 matching lines @@
   onDragEnterVolumesList_: function(list, event) {
     event.preventDefault();  // Required to prevent the cursor flicker.
     this.lastEnteredTarget_ = event.target;
     var item = list.getListItemAncestor(event.target);
     item = item && list.isItem(item) ? item : null;
     if (item === this.dropTarget_)
       return;
 
     var modelItem = item && list.dataModel.item(item.listIndex);
     if (modelItem.isShortcut) {
-      this.setDropTarget_(item, event.dataTransfer, entry);
+      this.setDropTarget_(item, event.dataTransfer, modelItem.entry);
     } else if (modelItem.isVolume && modelItem.volumeInfo.displayRoot) {
       this.setDropTarget_(
           item, event.dataTransfer, modelItem.volumeInfo.displayRoot);
     } else {
       this.clearDropTarget_();
     }
   },
 
   /**
    * @this {FileTransferController}
@@ skipping 424 matching lines @@
         !event.ctrlKey) {
       return 'move';
     }
     if (event.dataTransfer.effectAllowed === 'copyMove' &&
         event.shiftKey) {
       return 'move';
     }
     return 'copy';
   },
 };