Cast Extensions API: Factory method for creating a cast session

chrome/renderer/resources/extensions/cast_streaming_session_custom_bindings.js

+// Copyright 2013 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.
+
+// Custom binding for the Cast streaming API.
+
+var binding = require('binding').Binding.create('cast.streaming.session');
+var natives = requireNative('webrtc_natives');
+
+binding.registerCustomHook(function(bindingsAPI, extensionId) {
+  var apiFunctions = bindingsAPI.apiFunctions;
+  apiFunctions.setHandleRequest('create',
+      function(audioTrack, videoTrack, callback) {
+        natives.CreateSession(audioTrack, videoTrack, callback);
+  });
+});
+
+exports.binding = binding.generate();