Normalizing .dropEffect across platforms (specifically Windows).

chrome/browser/resources/ntp4/drag_wrapper.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.
 
 /**
  * @fileoverview DragWrapper
  * A class for simplifying HTML5 drag and drop. Classes should use this to
  * handle the nitty gritty of nested drag enters and leaves.
  */
 var DragWrapper = (function() {
@@ skipping 90 matching lines @@
     /**
      * Thunk for dragleave events fired on |target_|.
      * @param {Event} e A MouseEvent for the drag.
      * @private
      */
     onDragLeave_: function(e) {
       if (--this.dragEnters_ > 0)
         return;
 
       this.target_.classList.remove('drag-target');
-      this.handler_.doDragLeave();
+      this.handler_.doDragLeave(e);
     },
   };
 
   return DragWrapper;
 })();