Implement chrome.socket.bind/listen/accept for TCP server socket.

chrome/test/data/extensions/api_test/socket/experimental/background.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.
+
+const socket = chrome.socket;
+var sid;
+
+var onAccept = function(acceptInfo) {
+  // The result is undefined because the manifest does not specify the experimental permission.
+  chrome.test.assertEq(undefined, acceptInfo);
+  chrome.test.succeed();
+};
+
+var onListen = function(result) {
+  // The result is undefined because the manifest does not specify the experimental permission.
+  chrome.test.assertEq(undefined, result);
+  socket.accept(sid, onAccept);
+};
+
+var onCreate = function(socketInfo) {
+  sid = socketInfo.socketId;
+  socket.listen(sid, '127.0.0.1', 1234, onListen);
+};
+
+var onMessageReply = function() {
+  socket.create('tcp', {}, onCreate);
+};
+
+chrome.test.sendMessage("ready", onMessageReply);