[Extensions] Propagate activeTab hosts to extension background pages

chrome/test/data/extensions/api_test/active_tab/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.
 
 var assertEq = chrome.test.assertEq;
 var assertFalse = chrome.test.assertFalse;
 var assertTrue = chrome.test.assertTrue;
 var callbackFail = chrome.test.callbackFail;
 var callbackPass = chrome.test.callbackPass;
 
 var RoleType = chrome.automation.RoleType;
 
+function canXhr(url) {

[not at google - send to devlin, 2015/02/05 00:16:13]

Would be good to test iframes in here somewhere as well.

One way would be to inject an iframe into the tab (would need to be in
web_accessible_resources) then check it can XHR. Not too much extra code :)

[Devlin, 2015/02/05 19:54:50]

Done.

+  assertFalse(url == null);
+  var xhr = new XMLHttpRequest();
+  xhr.open('GET', url, false);
+  var success = true;
+  try {
+    xhr.send();
+  } catch(e) {
+    success = false;
+  }
+  return success;
+}
+
 chrome.browserAction.onClicked.addListener(function() {
   chrome.tabs.executeScript({ code: 'true' }, callbackPass());
-  chrome.automation.getTree(callbackPass(function(rootNode) {
-    assertFalse(rootNode == undefined);
-    assertEq(RoleType.rootWebArea, rootNode.role);
-    chrome.test.succeed();
-  }));
+
+  chrome.tabs.query({active:true}, function(tabs) {

[not at google - send to devlin, 2015/02/05 00:16:13]

no need for query, browserAction.onClicked takes the Tab

[Devlin, 2015/02/05 19:54:50]

Done.

+    assertTrue(canXhr(tabs[0].url));
+
+    chrome.automation.getTree(callbackPass(function(rootNode) {
+      assertFalse(rootNode == undefined);
+      assertEq(RoleType.rootWebArea, rootNode.role);
+      chrome.test.succeed();
+    }));
+  });
 });
 
 chrome.webNavigation.onCompleted.addListener(function(details) {
   chrome.tabs.executeScript({ code: 'true' }, callbackFail(
          'Cannot access contents of url "' + details.url +
          '". Extension manifest must request permission to access this host.'));
 
   chrome.automation.getTree(callbackFail(
       'Cannot request automation tree on url "' + details.url +
         '". Extension manifest must request permission to access this host.'));
+
+  assertFalse(canXhr(details.url));
 });