Reland: Communicate ExtensionSettings policy to renderers

chrome/test/data/extensions/api_test/content_scripts/policy/background.js

+// Copyright 2017 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 pass = chrome.test.callbackPass;
+var callbackFail = chrome.test.callbackFail;
+var listenForever = chrome.test.listenForever;
+
+var port;
+
+function testUrl(domain) {
+  return 'http://' + domain + ':' + port +
+      '/extensions/test_file.html';
+}
+
+function error(domain) {
+  return 'Cannot access contents of url "' + testUrl(domain) + '".' +
+    ' Extension manifest must request permission to access this host.';
+}
+
+// Creates a new tab, navigated to the specified |domain|.
+function createTestTab(domain, callback) {
+  var createdTabId = -1;
+  var done = listenForever(
+      chrome.tabs.onUpdated,
+      function(tabId, changeInfo, tab) {
+    if (tabId == createdTabId && changeInfo.status != 'loading') {
+      callback(tab);
+      done();
+    }
+  });
+
+  chrome.tabs.create({url: testUrl(domain)}, pass(function(tab) {
+    createdTabId = tab.id;
+  }));
+}
+
+chrome.test.getConfig(function(config) {
+  port = config.testServer.port;
+  chrome.test.runTests([
+
+   // Make sure we can't inject a script into a policy blocked host.
+   function policyBlocksInjection() {
+    createTestTab('example.com', pass(function(tab) {
+        chrome.tabs.executeScript(
+            tab.id, {code: 'document.title = "success"'},
+            callbackFail(
+                'This page cannot be scripted due to ' +
+                'an ExtensionsSettings policy.'));
+        }));
+   },
+  ]);
+});