[chromedriver] Introduce chromeOptions.useAutomationExtension.

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 e1a91b44b2c22e37e8e2fda887dbd605a76686af..cf4289b023a3c7874953bc90e325edb891563b16 100755
--- a/chrome/test/chromedriver/test/run_py_tests.py
+++ b/chrome/test/chromedriver/test/run_py_tests.py
@@ -1818,6 +1818,13 @@ class ChromeExtensionsCapabilityTest(ChromeDriverBaseTest):
     driver.SwitchToFrame('iframe')
     self.assertEqual('two', driver.ExecuteScript("return window['iframe_var']"))
 
+  def testDontUseAutomationExtension(self):
+    driver = self.CreateDriver(
+        experimental_options={'useAutomationExtension': False})
+    driver.Load('chrome:version')
+    command_line = driver.FindElement('id', 'command_line').GetText()
+    self.assertNotIn('load-extension', command_line)
+
 
 class ChromeLogPathCapabilityTest(ChromeDriverBaseTest):
   """Tests that chromedriver properly processes chromeOptions.logPath."""