Hide requests in an extension from other extensions

chrome/test/data/extensions/api_test/webrequest_extensions/main/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.
+
+var requests = [];
+chrome.webRequest.onBeforeRequest.addListener(function(details) {
+    requests.push(details.method + ' ' + details.url);
+}, {
+    types: ["xmlhttprequest", "main_frame"],
+    urls: ['*://*/*']
+});
+
+chrome.test.sendMessage('webRequestListening', function() {
+    if (requests.length === 1 &&
+        requests[0].indexOf('open-to-finish-test') >= 0) {
+        chrome.test.sendMessage('OK');
+    } else if (requests.length === 0) {
+        chrome.test.sendMessage('Expected one request for, received none.');
+    } else {
+        chrome.test.sendMessage('Unexpected requests:' + requests.join(', '));
+    }
+});