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

chrome/test/data/extensions/api_test/stubs/content_script.js

Index: chrome/test/data/extensions/api_test/stubs/content_script.js
diff --git a/chrome/test/data/extensions/api_test/stubs/content_script.js b/chrome/test/data/extensions/api_test/stubs/content_script.js
index 1b3f2ebc9e695ccdb2179b1c11d37915c43a22cc..6994a468bd0fe58d4acbddb7329b899a938b1be6 100644
--- a/chrome/test/data/extensions/api_test/stubs/content_script.js
+++ b/chrome/test/data/extensions/api_test/stubs/content_script.js
@@ -79,7 +79,7 @@ function testPath(path, expectError) {
       // to throw an error on access.
       try {
         if (typeof(module[parts[i]]) == "undefined" &&
-            path != "extension.lastError" &&
+            path != "runtime.lastError" &&
             path != "runtime.lastError" &&
             path != "runtime.id") {
           logToConsoleAndStdout(" fail (undefined and not throwing error): " +