Cleanup tests related to controls hiding/fading in/out

LayoutTests/media/audio-controls-do-not-fade-out.html

Index: LayoutTests/media/audio-controls-do-not-fade-out.html
diff --git a/LayoutTests/media/audio-controls-do-not-fade-out.html b/LayoutTests/media/audio-controls-do-not-fade-out.html
index ff5bd6e065bf2a292b773458aec852410d553cc9..89310a37c1e27f46e5fa0549c6225edab9b151fa 100644
--- a/LayoutTests/media/audio-controls-do-not-fade-out.html
+++ b/LayoutTests/media/audio-controls-do-not-fade-out.html
@@ -13,15 +13,16 @@
         testRunner.dumpAsText();
     }
 
-    document.getElementById("audio").addEventListener("timeupdate", function(e)
+    var audio = document.getElementById("audio");
+    audio.addEventListener("playing", function()
     {
-        if (e.target.currentTime < 4) {
-            return;
-        }
-        var controls = mediaControlsElement(internals.shadowRoot(e.target).firstChild, "-webkit-media-controls-panel");
-        var opacity = getComputedStyle(controls).opacity;
-        document.getElementById("result").innerText = opacity < 1 ? "FAIL" : "PASS";
-        testRunner.notifyDone();
+        runAfterControlsHidden(function()
+        {
+            var controls = mediaControlsButton(audio, "panel");
+            var opacity = getComputedStyle(controls).opacity;
+            document.getElementById("result").innerText = opacity < 1 ? "FAIL" : "PASS";

[philipj_slow, 2014/05/26 13:38:47]

testExpected("getComputedStyle(controls).opacity", 1); would make for more a
more readable -expected.txt in case of failure I think.

[fs, 2014/05/26 15:02:09]

Done.

+            testRunner.notifyDone();
+        }, audio);
     });
 </script>
 </body>