Don't allow main world initialization while creating the initial empty document

chrome/test/data/extensions/api_test/bindings/chromei18nrepro/iframe.js

Index: chrome/test/data/extensions/api_test/bindings/chromei18nrepro/iframe.js
diff --git a/base/test/malloc_wrapper.cc b/chrome/test/data/extensions/api_test/bindings/chromei18nrepro/iframe.js
similarity index 52%
copy from base/test/malloc_wrapper.cc
copy to chrome/test/data/extensions/api_test/bindings/chromei18nrepro/iframe.js
index eb280a3eeea52f49e534c7c5e3f6f7a40e80a750..a6da8772a7be008fb17c92996543723761f74354 100644
--- a/base/test/malloc_wrapper.cc
+++ b/chrome/test/data/extensions/api_test/bindings/chromei18nrepro/iframe.js
@@ -2,10 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "malloc_wrapper.h"
-
-#include <stdlib.h>
-
-void* MallocWrapper(size_t size) {
-  return malloc(size);
-}
+// chrome.i18n *should* be defined, since this is an extension iframe.
+console.log(chrome.i18n);
+window.top.postMessage(chrome.i18n != undefined, '*');