Update TestExpectations crbug numbers for modern media controls failures

Bug: 775534
Change-Id: Ie06e780366afede4b6f9cd89f69e40bc14044fab
Reviewed-on: https://chromium-review.googlesource.com/1014654Reviewed-by: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551200}

third_party/WebKit/LayoutTests/TestExpectations

@@ -4092,7 +4092,7 @@ crbug.com/831993 [ Linux ] virtual/gpu-rasterization/images/cross-fade-overflow-
 
 # Sheriff 2018-04-13
 crbug.com/832842 [ Win7 ] virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/RTCDTMFSender-ontonechange.https.html [ Failure ]
-crbug.com/775534 [ Linux ] media/controls/closed-captions-dynamic-update.html [ Skip ]
-crbug.com/775534 [ Linux ] virtual/new-remote-playback-pipeline/media/controls/closed-captions-dynamic-update.html [ Skip ]
-crbug.com/775534 [ Linux Win Mac ] media/video-controls-focus-movement-on-hide.html [ Pass Failure ]
+crbug.com/833655 [ Linux ] media/controls/closed-captions-dynamic-update.html [ Skip ]
+crbug.com/833655 [ Linux ] virtual/new-remote-playback-pipeline/media/controls/closed-captions-dynamic-update.html [ Skip ]
+crbug.com/833658 [ Linux Win Mac ] media/video-controls-focus-movement-on-hide.html [ Pass Failure ]
 crbug.com/833100 [ Mac ] external/wpt/battery-status/battery-full-manual.https.html [ Failure ]