Change "ldap" to "username".

Change-Id: Ic993758ea901d039c5fdac978e516ba20f95005d
Reviewed-on: https://chromium-review.googlesource.com/830611Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

git_cl.py

@@ -3883,8 +3883,8 @@ class _GitCookiesChecker(object):
 
   @staticmethod
   def _parse_identity(identity):
-    """Parses identity "git-<ldap>.example.com" into <ldap> and domain."""
-    # Special case: users whose ldaps contain ".", which are generally not
+    """Parses identity "git-<username>.domain" into <username> and domain."""
+    # Special case: usernames that contain ".", which are generally not
     # distinguishable from sub-domains. But we do know typical domains:
     if identity.endswith('.chromium.org'):
       domain = 'chromium.org'

tests/git_cl_test.py

@@ -560,7 +560,8 @@ class GitCookiesCheckerTest(TestCase):
     # Specical case because we know there are no subdomains in chromium.org.
     self.assertEqual(self.c._parse_identity('git-note.period.chromium.org'),
                      ('note.period', 'chromium.org'))
-    # Pathological: .period. can be either ldap OR domain, more likely domain.
+    # Pathological: ".period." can be either username OR domain, more likely
+    # domain.
     self.assertEqual(self.c._parse_identity('git-note.period.example.com'),
                      ('note', 'period.example.com'))