Does not crash with unexpected function in debug build.

chrome/test/data/extensions/api_test/input_ui/other/test.js

Index: chrome/test/data/extensions/api_test/input_ui/other/test.js
diff --git a/chrome/test/data/extensions/api_test/input_ui/other/test.js b/chrome/test/data/extensions/api_test/input_ui/other/test.js
new file mode 100644
index 0000000000000000000000000000000000000000..e31e9ddbad7e3388f38fe5198e6e8bffe9c8efdb
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/input_ui/other/test.js
@@ -0,0 +1,16 @@
+// 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.
+
+// experimental.inputUI API test for Chrome
+// browser_tests --gtest_filter=ExtensionApiTest.InputUI
+
+chrome.test.runTests([
+  function inputUINotExist() {
+    if (!chrome.experimental.inputUI) {
+      chrome.test.succeed();
+    } else {
+      chrome.test.fail();
+    }
+  }
+]);