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

chrome/test/data/extensions/context_menus/frames/test.js

Index: chrome/test/data/extensions/context_menus/frames/test.js
diff --git a/chrome/test/data/extensions/context_menus/frames/test.js b/chrome/test/data/extensions/context_menus/frames/test.js
index 65d65619c6fb2414341df246819820c260cb356b..2a2bad1701a3dda0d86c2112e8ec85324b5dfda5 100644
--- a/chrome/test/data/extensions/context_menus/frames/test.js
+++ b/chrome/test/data/extensions/context_menus/frames/test.js
@@ -6,11 +6,11 @@ window.onload = function() {
   chrome.contextMenus.create(
       {"title":"Page item", contexts: ["page"]},
       function() {
-        if (!chrome.extension.lastError) {
+        if (!chrome.runtime.lastError) {
           chrome.contextMenus.create(
           {"title":"Frame item", contexts: ["frame"]},
           function() {
-            if (!chrome.extension.lastError) {
+            if (!chrome.runtime.lastError) {
               chrome.test.sendMessage("created items");
             }
           });