[Cast] Disable autohide of media controls for remote playback

LayoutTests/SlowTests

Index: LayoutTests/SlowTests
diff --git a/LayoutTests/SlowTests b/LayoutTests/SlowTests
index 861a33e2ad407cda7d03ce7f5e9a96cb8f1f43d9..cb5cf74df659f9117c57b9c69b1314defd1b5c3b 100644
--- a/LayoutTests/SlowTests
+++ b/LayoutTests/SlowTests
@@ -49,6 +49,7 @@ crbug.com/24182 jquery/offset.html [ Slow ]
 crbug.com/24182 jquery/traversing.html [ Slow ]
 crbug.com/24182 media/track/track-cues-cuechange.html [ Slow ]
 crbug.com/24182 media/track/track-cues-enter-exit.html [ Slow ]
+crbug.com/24182 media/controls-cast-do-not-fade-out.html [ Slow ]

[Mike West, 2014/10/14 03:55:17]

How slow is this test? It's unfortunate that we have to add another item to
SlowTests. :(

It's also surprising that _all_ the tests here point to the same bug. If the
media tests all have the same root cause of slowness, perhaps it makes sense to
tie them together with a separate bug.

[whywhat, 2014/10/14 19:30:57]

It's slightly longer than the default 6 seconds timeout. One has to wait for
about 3.5 seconds until the first check and then the same amount of time until
the second check.
AFAIK, the media tests have different cause of slowness. No idea why all these
exceptions point to the same bug.

 crbug.com/24182 perf/append-text-nodes-without-renderers.html [ Slow ]
 crbug.com/24182 perf/set-attribute.html [ Slow ]
 crbug.com/24182 svg/filters/big-sized-filter.svg [ Slow ]