Implement externally_connectable! Web pages can now communicate directly with

chrome/test/data/extensions/api_test/messaging/externally_connectable/web_connectable/background.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.
+
+// The test extension for externally_connectable just echos all messages it
+// gets. The test runners are in the sites/ directory.
+
+chrome.runtime.onMessageExternal.addListener(function(message, sender, reply) {
+  reply(message);
+});
+
+chrome.runtime.onConnectExternal.addListener(function(port) {

[Jeffrey Yasskin, 2013/06/08 00:28:09]

Both of these tests should include some mention of the sender, since that's
going to have a different format for web senders than extension senders.

Or extend messaging/connect_external to check this.

[not at google - send to devlin, 2013/06/08 02:02:33]

Ah. Very good point. WDYT now.

+  port.onMessage.addListener(function(message) {
+    port.postMessage(message);
+  });
+});