Mark media/video-controls-rendering.html as flaky on more platforms

It's flaky not only on Mac but also on Windows and Linux.

Bug: 1054977
Change-Id: Ia0ada52f774bc8f8cd927650c7498b5105df6460
No-Try: true
Tbr: mlamouri@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2215147Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#771670}

third_party/blink/web_tests/TestExpectations

@@ -5701,7 +5701,7 @@ crbug.com/1053903 [ Linux ] external/wpt/webxr/events_referenceSpace_reset_inlin
 crbug.com/1053903 [ Win ] external/wpt/webxr/events_referenceSpace_reset_inline.https.html [ Pass Failure Timeout ]
 
 # Sheriff 2020-02-21
-crbug.com/1054977 [ Mac ] media/video-controls-rendering.html [ Pass Failure ]
+crbug.com/1054977 media/video-controls-rendering.html [ Pass Failure ]
 
 # Sheriff 2020-02-21
 crbug.com/1054916 [ Linux ] external/wpt/webxr/dom-overlay/ar_dom_overlay.https.html [ Pass Failure Timeout ]