[chromedriver] Use nodeType instead of instanceof.

chrome/test/chromedriver/test/run_py_tests.py

Index: chrome/test/chromedriver/test/run_py_tests.py
diff --git a/chrome/test/chromedriver/test/run_py_tests.py b/chrome/test/chromedriver/test/run_py_tests.py
index 3d48c3df3b72e1719d820253f004ac4be11e356b..cd47d33dccca1b8436ed2391b8ae7804d8c315d1 100755
--- a/chrome/test/chromedriver/test/run_py_tests.py
+++ b/chrome/test/chromedriver/test/run_py_tests.py
@@ -1372,6 +1372,13 @@ class ChromeDriverTest(ChromeDriverBaseTestWithWebServer):
     if (self._driver.w3c_compliant):
       self.assertEquals(len(element._id), w3c_id_length)
 
+  def testFindElementWhenElementIsOverridden(self):
+    self._driver.Load('about:blank')
+    self._driver.ExecuteScript(
+        'document.body.appendChild(document.createElement("a"));')
+    self._driver.ExecuteScript('window.Element = {}')
+    self.assertEquals(1, len(self._driver.FindElements('tag name', 'a')))
+
 
 class ChromeDriverPageLoadTimeoutTest(ChromeDriverBaseTestWithWebServer):