Removed old media-internals page and rewrote it.

content/browser/resources/media/main/playerInfo.js

+/**
+ * @fileoverview A class for keeping track of the details of a player.
+ */
+
+var PlayerInfo = (function () {
+    "use strict";
+
+    /**
+     * A class that keeps track of properties on a media player.
+     * @param id     A unique id that can be used to identify this player.
+     * @constructor
+     */
+    function PlayerInfo(id) {
+        this.id = id;
+        // The current value of the properties for this player
+        this.properties = {};
+        // All of the past (and present) values of the properties
+        this.pastValues = {};
+
+        // Every single event in the order in which they were received
+        this.allEvents = [];
+        this.lastRendered = 0;
+
+        this.firstTimestamp = -1;
+    }
+
+
+    /**
+     * Adds or set a property on this player.
+     * This is the default logging method as it keeps track of old values
+     * @param timestamp  The time in milliseconds since the Epoch
+     * @param key        A String key that describes the property
+     * @param value      The value of the property.
+     */
+    PlayerInfo.prototype.addProperty = function (timestamp, key, value) {
+        // The first timestamp that we get will be recorded.
+        // Then, all future timestamps are deltas of that.
+        if (this.firstTimestamp === -1) {
+            this.firstTimestamp = timestamp;
+        }
+
+        if (typeof key !== 'string') {
+            throw new Error(typeof key + " is not a valid key type");
+        }
+
+        this.properties[key] = value;
+
+        if (!this.pastValues[key]) {
+            // Preallocate for performance
+            this.pastValues[key] = new Array(512);
+        }
+
+        var recordValue = {
+            time: timestamp - this.firstTimestamp,
+            key: key,
+            value: value
+        };
+
+        this.pastValues[key].push(recordValue);
+        this.allEvents.push(recordValue);
+    };
+
+
+    /**
+     * Adds or set a property on this player.
+     * Does not keep track of old values.  This is better for
+     * values that get spammed repeatedly.
+     * @param timestamp  The time in milliseconds since the Epoch
+     * @param key        A String key that describes the property
+     * @param value      The value of the property.
+     */
+    PlayerInfo.prototype.addPropertyNoRecord =
+        function (timestamp, key, value) {
+            this.addProperty(timestamp, key, value);
+            this.allEvents.pop();
+            this.pastValues[key] = [this.pastValues[key].pop()];
+        };
+
+    return PlayerInfo;
+}());