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..e3ba1d6ef705d8e9be9ab6a54bcafca377c8e80e 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 +32,10 @@ chrome.test.runTests([
       chrome.test.assertTrue(!!win);
       chrome.test.assertTrue(win instanceof Window);
       chrome.test.assertFalse(win.document.webkitHidden);
+      // Test for security origin.
+      // If security origin is not correctly set, there will be securtiy
+      // exceptions when accessing DOM or add event listeners.
+      win.addEventListener('unload', function() {});
       chrome.test.succeed();
     });
   },
@@ -40,7 +44,12 @@ chrome.test.runTests([
     chrome.input.ime.createWindow(options, function(win) {
       chrome.test.assertNoLastError()
       chrome.test.assertTrue(!!win);
+      chrome.test.assertTrue(win instanceof Window);
       chrome.test.assertFalse(win.document.webkitHidden);
+      // test for security origin.
+      // If security origin is not correctly set, there will be securtiy
+      // exceptions when accessing DOM or add event listeners.
+      win.addEventListener('unload', function() {});
       chrome.test.succeed();
     });
   }