Correctly sets the security origin for the IME window.

chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js

Index: chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
diff --git a/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js b/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
index 3cb752d05f75c7754e0770e41ae471cb7ffe404e..0537657a5f0fdadf4faa417a3f4d39de245dc7b7 100644
--- a/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
+++ b/chrome/test/data/extensions/api_test/input_ime_nonchromeos/background.js
@@ -32,6 +32,8 @@ chrome.test.runTests([
       chrome.test.assertTrue(!!win);
       chrome.test.assertTrue(win instanceof Window);
       chrome.test.assertFalse(win.document.webkitHidden);
+      // test for security origin.
+      win.addEventListener('unload', function() {});
       chrome.test.succeed();
     });
   },
@@ -41,6 +43,8 @@ chrome.test.runTests([
       chrome.test.assertNoLastError()
       chrome.test.assertTrue(!!win);
       chrome.test.assertFalse(win.document.webkitHidden);
+      // test for security origin.

[Devlin, 2016/03/04 00:07:51]

Please explain how this tests the security origin.

[Shu Chen, 2016/03/04 11:36:28]

Done.

+      win.addEventListener('unload', function() {});
       chrome.test.succeed();
     });
   }