Browser tests for starting a drag-and-drop out of an OOPIF.

chrome/test/data/drag_and_drop/event_monitoring.js

 // Copyright 2016 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.
 
 /* Reports an event to DragAndDropBrowserTest and  DOMDragEventWaiter */
 window.reportDragAndDropEvent = function(ev) {
   function safe(f) {
     try {
       return f();
     } catch(err) {
@@ skipping 17 matching lines @@
             .map(function(file) { return file.name; })
             .sort().join();
       }),
       mime_types: safe(function() {
         return Array.from(ev.dataTransfer.types).sort().join();
       }),
       window_name: window.name
     });
   }
 }