Fixing inadvertant CQ breakage from depot tools change.

CL that cause the issue: https://codereview.chromium.org/183793010

Symptoms: commit queue presubmit checks failed.

BUG=None

Review URL: https://codereview.chromium.org/215163003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@259947 0039d316-1c4b-4281-b951-d872f2087c98

rietveld.py

@@ -40,6 +40,9 @@ class Rietveld(object):
   """Accesses rietveld."""
   def __init__(self, url, email, password, extra_headers=None):
     self.url = url.rstrip('/')
+    # Email and password are accessed by commit queue, keep them.
+    self.email = email
+    self.password = password
     # TODO(maruel): It's not awesome but maybe necessary to retrieve the value.
     # It happens when the presubmit check is ran out of process, the cookie
     # needed to be recreated from the credentials. Instead, it should pass the