Add support for codepen to form_based_credentials_background

tools/telemetry/telemetry/core/browser_credentials.py

Index: tools/telemetry/telemetry/core/browser_credentials.py
diff --git a/tools/telemetry/telemetry/core/browser_credentials.py b/tools/telemetry/telemetry/core/browser_credentials.py
index d78ced98568ed79a18274462f88c0300532c5948..b44e47b07a1157ead2e2089b3957370bb160328b 100644
--- a/tools/telemetry/telemetry/core/browser_credentials.py
+++ b/tools/telemetry/telemetry/core/browser_credentials.py
@@ -7,8 +7,10 @@ import logging
 import os
 
 from telemetry.core import util
+from telemetry.core.backends import codepen_credentials_backend
 from telemetry.core.backends import facebook_credentials_backend
 from telemetry.core.backends import google_credentials_backend
+from telemetry.page.actions import action_runner
 from telemetry.unittest import options_for_unittests
 
 
@@ -24,6 +26,7 @@ class BrowserCredentials(object):
 
     if backends is None:
       backends = [
+        codepen_credentials_backend.CodePenCredentialsBackend(),
         facebook_credentials_backend.FacebookCredentialsBackend(),
         google_credentials_backend.GoogleCredentialsBackend()]
 
@@ -55,8 +58,9 @@ class BrowserCredentials(object):
           'Unrecognized credentials type: %s', credentials_type)
     if credentials_type not in self._credentials:
       return False
+    runner = action_runner.ActionRunner(tab)
     return self._backends[credentials_type].LoginNeeded(
-      tab, self._credentials[credentials_type])
+      tab, runner, self._credentials[credentials_type])
 
   def LoginNoLongerNeeded(self, tab, credentials_type):
     assert credentials_type in self._backends