[Async][WIP] Call FrameLoader::checkCompleted() asynchronously to avoid sync body.onload()

third_party/WebKit/LayoutTests/fast/events/media-focus-in-standalone-media-document.html

Index: third_party/WebKit/LayoutTests/fast/events/media-focus-in-standalone-media-document.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/media-focus-in-standalone-media-document.html b/third_party/WebKit/LayoutTests/fast/events/media-focus-in-standalone-media-document.html
index ad515fdda6789d150dbe7d3f36eafda6b462be7b..8353c6599e5caf946378098f546fb2665a144f23 100644
--- a/third_party/WebKit/LayoutTests/fast/events/media-focus-in-standalone-media-document.html
+++ b/third_party/WebKit/LayoutTests/fast/events/media-focus-in-standalone-media-document.html
@@ -6,13 +6,9 @@
         <script type="text/javascript">
             var videoElement;
             var standaloneMediaDocument;
-            var skipOnFirstEmptyLoad = 0;
 
             function frameLoaded()
             {
-                if (++skipOnFirstEmptyLoad == 1)
-                    return;
-
                 standaloneMediaDocument = document.getElementById("videoframe").contentDocument;
                 videoElement = standaloneMediaDocument.querySelector("video");
 
@@ -48,8 +44,9 @@
         <p>
             This tests that  media element in a standalone media document cannot be focused directly using focus() method or by mouse click.
         </p>
-        <iframe id="videoframe" width=380 height=330 onload="frameLoaded()"></iframe>
+        <iframe id="videoframe" width=380 height=330></iframe>
         <script type="text/javascript">
+            document.getElementById("videoframe").addEventListener('load', frameLoaded);
             document.getElementById("videoframe").src = "../../media/" + findMediaFile("video", "content/test");
         </script>
     </body>