[Password Manager Automated tests] Fix enabling the password manager

components/test/data/password_manager/automated_tests/environment.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """The testing Environment class.
 
 It holds the WebsiteTest instances, provides them with credentials,
 provides clean browser environment, runs the tests, and gathers the
 results.
 """
@@ skipping 150 matching lines @@
     # TODO(melandory): We should check why it's off in a first place.
     # TODO(melandory): Investigate, maybe there is no need to enable it that
     # often.
     self.driver.get("chrome://settings")
     self.driver.switch_to_frame("settings")
     script = "document.getElementById('advanced-settings-expander').click();"
     self.driver.execute_script(script)
     # TODO(vabr): Wait until element is displayed instead.
     time.sleep(2)
     script = (
-        "document.querySelector('#password-manager-enabled').checked = true;")
+        "if (!document.querySelector('#password-manager-enabled').checked) {"
+        "  document.querySelector('#password-manager-enabled').click();"
+        "}")
     self.driver.execute_script(script)
     time.sleep(2)
 
   def _OpenNewTab(self):
     """Open a new tab, and loads the internals page in the old tab.
 
     Returns:
       A handle to the new tab.
     """
 
@@ skipping 102 matching lines @@
       except Exception as e:
         successful = False
         error = e.message
       self.tests_results.append(
           (websitetest.name, test_type, successful, error))
 
   def Quit(self):
     """Shuts down the driver."""
 
     self.driver.quit()