Removed old media-internals page and rewrote it.

content/browser/resources/media/item_store.js

-// Copyright (c) 2011 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.
-
-cr.define('media', function() {
-
-  /**
-   * This class stores hashes by their id field and provides basic methods for
-   * iterating over the collection.
-   * @constructor
-   */
-  function ItemStore() {
-    this.items_ = {};
-  }
-
-  ItemStore.prototype = {
-    /**
-     * Get a sorted list of item ids.
-     * @return {Array} A sorted array of ids.
-     */
-    ids: function() {
-      var ids = [];
-      for (var i in this.items_)
-        ids.push(i);
-      return ids.sort();
-    },
-
-    /**
-     * Add an item to the store.
-     * @param {Object} item The item to be added.
-     * @param {string} item.id The id of the item.
-     */
-    addItem: function(item) {
-      this.items_[item.id] = item;
-    },
-
-    /**
-     * Add a dictionary of items to the store.
-     * @param {Object} items A dictionary of individual items. The keys are
-     *    irrelevant but each must have an id field.
-     */
-    addItems: function(items) {
-      for (id in items)
-        this.addItem(items[id]);
-    },
-
-    /**
-     * Remove an item from the store.
-     * @param {string} id The id of the item to be removed.
-     */
-    removeItem: function(id) {
-      delete this.items_[id];
-    },
-
-    /**
-     * Map this itemStore to an Array. Items are sorted by id.
-     * @param {function(*)} mapper The mapping function applied to each item.
-     * @return {Array} An array of mapped items.
-     */
-    map: function(mapper) {
-      var items = this.items_;
-      var ids = this.ids();
-      return ids.map(function(id) { return mapper(items[id]); });
-    }
-  };
-
-  return {
-    ItemStore: ItemStore
-  };
-});