Fix TextTrackMode test

LayoutTests/media/track/track-mode.html

Index: LayoutTests/media/track/track-mode.html
diff --git a/LayoutTests/media/track/track-mode.html b/LayoutTests/media/track/track-mode.html
index 82e35bdccd51c47cc6b322b145e4305d7f06f9ba..07c0a11c2417e8c460f14e857163ac4a6a0f47ef 100644
--- a/LayoutTests/media/track/track-mode.html
+++ b/LayoutTests/media/track/track-mode.html
@@ -41,6 +41,13 @@
                 testExpected("video.textTracks[0].mode", "showing");
                 consoleWrite("");
 
+                consoleWrite("<b>*** Set to numeric value (no longer supported), should return default</b>");

[jsbell, 2015/02/27 16:50:35]

Missing ) inside the string

[jsbell, 2015/02/27 16:54:12]

Ignore this - the ) is there, it was just slightly scrolled offscreen for me. :(

Sorry for the noise!

+                var value = "2";
+                run("textTrack.mode = '" + value + "'");

[jsbell, 2015/02/27 16:50:35]

Since this is testing numeric values, this should be just:

run("textTrack.mode = 2");

(bindings will coerce it to a string anyway, but this IMHO this captures the
intent of the test more clearly)

[Paritosh Kumar, 2015/03/02 04:39:35]

Done. Thanks Jsbell.

+                testExpected("textTrack.mode", "showing");
+                testExpected("video.textTracks[0].mode", "showing");
+                consoleWrite("");
+
                 consoleWrite("<b>*** Set to known values</b>");
                 consoleWrite("<b>++ 'disabled'</b>");
                 setMode("disabled");