[Extensions] Update web API cloberring for platform apps

chrome/test/data/extensions/app_forbidden_apis/document_apis/background.js

Index: chrome/test/data/extensions/app_forbidden_apis/document_apis/background.js
diff --git a/chrome/test/data/extensions/app_forbidden_apis/document_apis/background.js b/chrome/test/data/extensions/app_forbidden_apis/document_apis/background.js
new file mode 100644
index 0000000000000000000000000000000000000000..06c4e905899faa78ead350fd963b8228cfbb7dc3
--- /dev/null
+++ b/chrome/test/data/extensions/app_forbidden_apis/document_apis/background.js
@@ -0,0 +1,17 @@
+// Copyright 2016 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.
+
+'use strict';
+
+var writeSuccess = true;
+try {
+  Document.prototype.write.call(document, 'Hello, world');
+} catch (e) {
+  writeSuccess = false;
+}
+
+if (writeSuccess)
+  chrome.test.fail();
+else
+  chrome.test.succeed();