Moving where I'm doing dropEffect normalization.

chrome/browser/resources/ntp4/bookmarks_page.js

 // Copyright (c) 2011 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.
 
 cr.define('ntp4', function() {
   'use strict';
 
   var localStrings = new LocalStrings;
 
   /**
@@ skipping 488 matching lines @@
 
     /** @inheritDoc */
     get extraBottomPadding() {
       return 40;
     },
 
     /** @inheritDoc */
     setDropEffect: function(dataTransfer) {
       var tile = ntp4.getCurrentlyDraggingTile();
       if (tile && tile.querySelector('.bookmark'))
-        dataTransfer.dropEffect = 'move';
+        ntp4.setCurrentDropEffect(dataTransfer, 'move');
       else
-        dataTransfer.dropEffect = 'copy';
+        ntp4.setCurrentDropEffect(dataTransfer, 'copy');
     },
 
     /** @inheritDoc */
     addDragData: function(dataTransfer, index) {
       var parentId = ROOT_NODE_ID == this.id ? BOOKMARKS_BAR_ID : this.id;
       var currentlyDraggingTile = ntp4.getCurrentlyDraggingTile();
       if (currentlyDraggingTile) {
         var tileContents = currentlyDraggingTile.firstChild;
         if (tileContents.classList.contains('most-visited')) {
           this.generateBookmarkForLink(parentId, index,
@@ skipping 111 matching lines @@
       tile.stripeColor = color;
   }
 
   return {
     BookmarksPage: BookmarksPage,
     initBookmarkChevron: initBookmarkChevron,
   };
 });
 
 window.addEventListener('load', ntp4.initBookmarkChevron);