Use window.URL instead of window.webkitURL.

chrome/test/data/extensions/api_test/tab_capture/performance.js

 // Copyright 2014 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.
 
 // The tests here cover the end-to-end functionality of tab capturing and
 // playback as video.  The page generates a test patter (moving balls) and
 // the rendering output of the tab is captured into a LocalMediaStream.  Then,
 // the LocalMediaStream is plugged into a video element for playback.
 //
 
 // Global to prevent gc from eating the video tag.
 var video = null;
 
 function TestStream(stream) {
   // Create video and canvas elements, but no need to append them to the
   // DOM.
   video = document.createElement("video");
   video.width = 1920;
   video.height = 1080;
   video.addEventListener("error", chrome.test.fail);
 
   var canvas = document.createElement("canvas");
   canvas.width = video.width;
   canvas.height = video.height;
   var context = canvas.getContext("2d");
   document.body.appendChild(canvas);
   var start_time = new Date().getTime();
 
   // Play the LocalMediaStream in the video element.
-  video.src = webkitURL.createObjectURL(stream);
+  video.src = URL.createObjectURL(stream);
   video.play();
 
   var frame = 0;
   function draw() {
     // Run for 10 seconds.
     if (new Date().getTime() - start_time > 10000) {
       chrome.test.succeed();
       // Note that the API testing framework might not terminate if we keep
       // animating and capturing, so we have to make sure that we stop doing
       // that here.
@@ skipping 68 matching lines @@
         }
       }
     },
     TestStream);
 }
 
 chrome.test.runTests([ tabCapturePerformanceTest ]);
 
 // TODO(hubbe): Consider capturing audio as well, need to figure out how to
 // capture relevant statistics for that though.