Update references to the extension messaging APIs to point to the "runtime"

chrome/test/data/extensions/api_test/messaging/connect_external/test.js

 // Copyright (c) 2011 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 testId = "bjafgdebaacbbbecmhlhpofkepfkgcpa";
 
+// Call with |api| as either chrome.runtime or chrome.extension, so that both
+// get tested (extension is aliased to runtime).
+function connectExternalTest(api) {
+  var port = api.connect(testId, {name: "extern"});
+  port.postMessage({testConnectExternal: true});
+  port.onMessage.addListener(chrome.test.callbackPass(function(msg) {
+    chrome.test.assertTrue(msg.success, "Message failed.");
+    chrome.test.assertEq(msg.senderId, location.host,
+                         "Sender ID doesn't match.");
+  }));
+}
+
 chrome.test.runTests([
-  function connectExternal() {
-    var port = chrome.extension.connect(testId, {name: "extern"});
-    port.postMessage({testConnectExternal: true});
-    port.onMessage.addListener(chrome.test.callbackPass(function(msg) {
-      chrome.test.assertTrue(msg.success, "Message failed.");
-      chrome.test.assertEq(msg.senderId, location.host,
-                           "Sender ID doesn't match.");
-    }));
+  function connectExternal_extension() {
+    connectExternalTest(chrome.extension);
+  },
+  function connectExternal_runtime() {
+    connectExternalTest(chrome.runtime);
   }
 ]);