NTP4: Add ability to drag links to the apps pages.

chrome/browser/resources/ntp4/most_visited_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 TilePage = ntp4.TilePage;
 
   /**
@@ skipping 262 matching lines @@
         this.createTiles_();
         this.data_ = data.slice(0, THUMBNAIL_COUNT);
       } else {
         this.data_ = refreshData(this.data_, data);
       }
 
       this.updateTiles_();
     },
 
     /** @inheritDoc */
-    acceptOutsideDrags: function() {
-      return false;
+    shouldAcceptDrag: function(tile, dataTransfer) {
+      return this.contains(tile);
     },
 
     /** @inheritDoc */
     heightForWidth: heightForWidth,
   };
 
   /**
    * We've gotten additional Most Visited data. Update our old data with the
    * new data. The ordering of the new data is not important, except when a
    * page is pinned. Thus we try to minimize re-ordering.
@@ skipping 62 matching lines @@
     }
 
     return oldData;
   };
 
   return {
     MostVisitedPage: MostVisitedPage,
     refreshData: refreshData,
   };
 });