Removed old media-internals page and rewrote it.

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

+var logPainter = (function () {
+    "use strict";
+
+    var logPainter = {};
+
+    // Creates a filter function for filtering the logs.
+    function genFilterFun(text) {
+        if (text.trim().length === 0) {
+            return function () {
+                return true;
+            };
+        }
+
+        var split = text.split(",");
+        var trimmed = goog.array.map(split, function (x) {
+            return x.trim().toLowerCase();
+        });
+
+        return function (x) {
+            return trimmed.indexOf(x.key.trim().toLowerCase()) !== -1;
+        };
+    }
+
+    logPainter.paintNew = function (playerInfo, div, properties) {
+        // Make sure that we don't have anything else inside.
+        removeChildren(div);
+        var table = makeTable("Timestamp", "Key", "Value");
+        var filterFun = genFilterFun(properties.filterText);
+
+        var logEntries = playerInfo.allEvents;
+        logEntries = goog.array.filter(logEntries, filterFun);
+
+        playerInfo.lastRendered = playerInfo.allEvents.length;
+
+        goog.array.forEach(logEntries, function (entry) {
+            appendRow(table, genLogRow(entry));
+        });
+
+        div.appendChild(table);
+    };
+
+    logPainter.paintExist = function (playerInfo, div, properties) {
+        // Find the existing table
+        var table = div.querySelector("table");
+        var filterFun = genFilterFun(properties.filterText);
+
+        // Cut off all the events that we've already rendered
+        var logEntries = playerInfo.allEvents.slice(playerInfo.lastRendered);
+        logEntries = goog.array.filter(logEntries, filterFun);
+
+        // Set the last rendered property so we
+        // slice at the right place next time
+        playerInfo.lastRendered = playerInfo.allEvents.length;
+
+        goog.array.forEach(logEntries, function (entry) {
+            appendRow(table, genLogRow(entry));
+        });
+    };
+
+    logPainter.invalidate = function (playerInfo) {
+        playerInfo.lastRendered = 0;
+    };
+
+    return logPainter;
+}());