Deflake video-controls-rendering.html

This CL uses video.requestVideoFrameCallback to guarantee a video frame
is displayed on screen before ending the test.

Bug: 1083314
Change-Id: I1e011d9bc18260f2bad3867892ed623bd4de4b0d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2561779
Commit-Queue: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Auto-Submit: Thomas Guilbert <tguilbert@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#831962}

third_party/blink/web_tests/TestExpectations

@@ -5491,9 +5491,6 @@ crbug.com/1051131 [ Fuchsia ] http/tests/appcache/abort-cache-onchecking-resourc
 # Sheriff 2020-02-19
 crbug.com/1053903 external/wpt/webxr/events_referenceSpace_reset_inline.https.html [ Pass Failure Timeout ]
 
-# Sheriff 2020-02-21
-crbug.com/1054977 media/video-controls-rendering.html [ Pass Failure ]
-
 # Sheriff 2020-02-28
 crbug.com/1056879 [ Win7 ] external/wpt/webxr/xrSession_requestAnimationFrame_getViewerPose.https.html [ Pass Failure Timeout ]
 crbug.com/1053861 http/tests/devtools/network/network-initiator-chain.js [ Pass Failure ]

third_party/blink/web_tests/media/video-controls-rendering.html

@@ -17,7 +17,6 @@ const videos = document.getElementsByTagName('video');
 for (var i = 0; i < videos.length; ++i) {
   enableTestMode(videos[i]);
 }
-init();
-setSrcByTagName('video', 'content/test.ogv');
+setVideoSrcAndWaitForFirstFrame('content/test.ogv');
 </script>
 </body>