Fixing tap handling in Fiole Manager.

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 3134 matching lines @@
       this.closeOnUnmount_ = false;
     }
 
     this.updateTitle_();
     this.updateGDataUnmountedPanel_();
     if (this.isOnGData())
       this.unmountedPanel_.classList.remove('retry-enabled');
   };
 
   FileManager.prototype.findListItemForEvent_ = function(event) {
-    return this.findListItemForNode_(event.srcElement);
+    return this.findListItemForNode_(event.touchedElement || event.srcElement);
   };
 
   FileManager.prototype.findListItemForNode_ = function(node) {
     var item = this.currentList_.getListItemAncestor(node);
     // TODO(serya): list should check that.
     return item && this.currentList_.isItem(item) ? item : null;
   };
 
   /**
    * Unload handler for the page.  May be called manually for the file picker
@@ skipping 1058 matching lines @@
     }
 
     var defaultActionSeparator =
         this.dialogDom_.querySelector('#default-action-separator');
 
     this.defaultActionMenuItem_.hidden = !taskItem;
     defaultActionSeparator.hidden = !taskItem;
   }
 })();