Hide requests in an extension from other extensions

chrome/test/data/extensions/api_test/webrequest_extensions/extension/background.js

+// Copyright (c) 2015 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.
+
+chrome.test.getConfig(function(config) {
+    var baseUrl = 'http://example.com:' + config.testServer.port;
+    var pageUrl = baseUrl + '/extensions/test_file.html?open-to-finish-test';
+
+    var x = new XMLHttpRequest();
+    x.open('GET', baseUrl + '/extensions/test_file.txt?extension');
+    x.onloadend = function() {
+        // Just a sanity check to ensure that the server is running.
+        // The test does not change the response.
+        chrome.test.assertEq('Hello!', x.responseText);
+
+        chrome.webNavigation.onCompleted.addListener(function(details) {
+            // After creating the tab, the onBeforeRequest event in the
+            // eavesdropping extension should be triggered.
+            chrome.test.sendMessage('extension_done');

[not at google - send to devlin, 2015/08/04 20:27:02]

good practice to remove listener after this.

[robwu, 2015/08/04 21:57:24]

I've removed the tab-load detection from the page, now I'm relying on a message
from the content script.

+        }, {
+            url: [{
+                urlEquals: pageUrl
+            }]
+        });
+        chrome.tabs.create({
+            url: pageUrl
+        });
+    };
+    x.send();
+});