Removed old media-internals page and rewrote it.

content/browser/resources/media/new/player_info.js

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/**
+ * @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();
+  };
+
+  return PlayerInfo;
+}());