Added a new automation hook ExecuteJavascriptInOOBEWebUI() to execute javascript prior to login on…

chrome/test/functional/chromeos_login.py

Index: chrome/test/functional/chromeos_login.py
diff --git a/chrome/test/functional/chromeos_login.py b/chrome/test/functional/chromeos_login.py
index b2f42e78a13fc67121d305d09066c044d6055e18..a74c81990254a674397dabe8333d0601c7c08451 100755
--- a/chrome/test/functional/chromeos_login.py
+++ b/chrome/test/functional/chromeos_login.py
@@ -31,6 +31,13 @@ class ChromeosLogin(pyauto.PyUITest):
     """
     return self.GetPrivateInfo()[account_type]
 
+  def testExecuteJavascriptInLoginWebUI(self):
+    """Test that javascript can be executed in the login page."""
+    msg = 'test success'
+    ret = self.ExecuteJavascriptInLoginWebUI(
+              'window.domAutomationController.send("%s");' % msg)
+    self.assertEqual(ret, msg)
+
   def testGoodLogin(self):
     """Test that login is successful with valid credentials."""
     credentials = self._ValidCredentials()