Display active audio streams on chrome://media-internals.

chrome/browser/resources/media_internals/media_internals.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.
+
+var audioStreams = new AudioStreamStore;
+var audioStreamDiv;
+
+// Receiving data for an audio stream.
+// Add it to audioStreams and refresh.
+onAudioUpdate = function(stream) {
+  audioStreams.addItem(stream);
+  audioStreamDiv.innerHTML = audioStreams.print();
+};
+
+// Receiving all data.
+// Add it all to the appropriate stores and refresh.
+onReceiveEverything = function(stuff) {
+  audioStreams.addItems(stuff.audio_streams);
+  audioStreamDiv.innerHTML = audioStreams.print();
+};
+
+// Removing an item from the appropriate store.
+onItemDeleted = function(item) {
+  var type = item.split(".")[0];
+  switch (type) {
+  case "audio_streams" :

[scherkus (not reviewing), 2011/07/07 20:57:30]

nit: remove extra space

[Scott Franklin, 2011/07/09 00:33:22]

Done.

+    audioStreams.removeItem(item);
+    audioStreamDiv.innerHTML = audioStreams.print();
+    break;
+  }
+};
+
+window.onload = function() {
+  audioStreamDiv = document.getElementById('audio-streams');
+
+  // Get information about all currently active media.
+  chrome.send('getEverything');
+};