Fix the optional permissions API.

chrome/test/data/extensions/api_test/content_scripts/permissions/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 assertTrue = chrome.test.assertTrue;
+var pass = chrome.test.callbackPass;
+var callbackFail = chrome.test.callbackFail;
+var listenForever = chrome.test.listenForever;
+
+var testTabId;
+var port;
+
+function testUrl(domain) {
+  return 'http://' + domain + ':' + port +
+      '/files/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([
+
+    // Before enabling the optional host permission, we shouldn't be able to
+    // inject content scripts.
+    function noAccess() {
+      createTestTab('a.com', pass(function(tab) {
+        testTabId = tab.id;
+        chrome.tabs.executeScript(
+            tab.id, {code: 'document.title = "success"'},
+            callbackFail(error('a.com')));
+      }));
+    },
+
+    // Add the host permission and see if we can inject a content script into
+    // existing and new tabs.
+    function addPermission() {
+      chrome.permissions.request(
+          {origins: ["http://*/*"]},
+          pass(function(granted) {
+        assertTrue(granted);
+
+        // Try accessing the existing tab.
+        chrome.tabs.executeScript(
+            testTabId, {code: 'document.title = "success"'},
+            pass(function() {
+          chrome.tabs.get(testTabId, pass(function(tab) {
+            assertEq('success', tab.title);
+          }));
+        }));
+
+        // Make sure we can inject a script into a new tab with that host.
+        createTestTab('a.com', pass(function(tab) {
+          chrome.tabs.executeScript(
+              tab.id, {code: 'document.title = "success"'},
+              pass(function() {
+            chrome.tabs.get(tab.id, pass(function(tab) {
+              assertEq('success', tab.title);
+            }));
+          }));
+        }));
+      }));
+    },
+
+    // Try the host again, except outside of the permissions.request callback.
+    function sameHost() {
+      createTestTab('a.com', pass(function(tab) {
+        chrome.tabs.executeScript(
+            tab.id, {code: 'document.title = "success"'},
+            pass(function() {
+          chrome.tabs.get(tab.id, pass(function(tab) {
+            assertEq('success', tab.title);
+          }));
+        }));
+      }));
+    },
+
+    // Try injecting the script into a new tab with a new host.
+    function newHost() {
+      createTestTab('b.com', pass(function(tab) {
+        chrome.tabs.executeScript(
+            tab.id, {code: 'document.title = "success"'},
+            pass(function() {
+          chrome.tabs.get(tab.id, pass(function(tab) {
+            assertEq('success', tab.title);
+          }));
+        }));
+      }));
+    }
+  ]);
+});