Attempt to deflake video-layer-crash.html.

third_party/WebKit/LayoutTests/media/video-paint-test.js

 function waitForMultipleEvents(name, times, func) {
     var count = 0;
     document.addEventListener(name, function() {
         if (++count == times) {
             func();
         }
     }, true);
 }
 
 function init()
 {
     var videos = document.getElementsByTagName('video');
 
     waitForMultipleEvents("canplaythrough", videos.length, function() {
         for (var i = 0; i < videos.length; ++i) {
             videos[i].play();
             videos[i].addEventListener("playing", function(event) {
                 event.target.pause();
                 event.target.currentTime = 0;
             });
         }
 
         waitForMultipleEvents("seeked", videos.length, function() {
-            if (window.testRunner)
-                testRunner.notifyDone();
+            if (window.testRunner) {
+                testRunner.layoutAndPaintAsyncThen(function() {
+                    testRunner.notifyDone();
+                });
+            }
         });
     });
 }
 
 if (window.testRunner) {
     testRunner.waitUntilDone();
     setTimeout(function() {
         document.body.appendChild(document.createTextNode('FAIL'));
         if (window.testRunner)
             testRunner.notifyDone();
@@ skipping 22 matching lines @@
 
 function initAndSeeked()
 {
     var videos = document.getElementsByTagName('video');
 
     waitForMultipleEvents("seeked", videos.length, function() {
         if (window.testRunner)
             testRunner.notifyDone();
     });
 }