Removed old media-internals page and rewrote it.

content/browser/resources/media/painters/playerListPainter.js

+var playerListPainter = (function () {
+    "use strict";
+    var playerListPainter = {};
+
+    playerListPainter.paintNew = function (playerInfo, div, opt_properties) {
+        var ul = document.createElement('ul');
+        var playerManager = opt_properties.playerManager;
+
+        goog.object.forEach(playerManager.players, function (player, id) {
+            // If we have the opportunity to name it
+            // something human readable, do so.
+
+            var name;
+            // If we have a url, use the file name (but not path) as the
+            // name that is displayed
+            if (player.properties.url) {
+                var split = player.properties.url.split("/");
+                name = split[split.length - 1];
+            }
+
+            name = name || player.properties.name || "player " + id;
+            var li = document.createElement('li');
+            var btn = document.createElement('button');
+
+            btn.onclick = function () {
+                playerManager.selectPlayer(id);
+            };
+
+            btn.appendChild(document.createTextNode(name));
+            li.appendChild(btn);
+            ul.appendChild(li);
+        });
+
+        removeChildren(div);
+        div.appendChild(ul);
+    };
+
+    playerListPainter.paintExist = playerListPainter.paintNew;
+
+    playerListPainter.invalidate = function () {
+    };
+
+    return playerListPainter;
+}());