Change default codereview instance to one we maintain.

R=agable@chromium.org
BUG=637561

Review-Url: https://codereview.chromium.org/2250573002
diff --git a/git_cl.py b/git_cl.py
index 2d6315c..41bbb98 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -63,7 +63,7 @@
 __version__ = '2.0'
 
 COMMIT_BOT_EMAIL = 'commit-bot@chromium.org'
-DEFAULT_SERVER = 'https://codereview.appspot.com'
+DEFAULT_SERVER = 'https://codereview.chromium.org'
 POSTUPSTREAM_HOOK_PATTERN = '.git/hooks/post-cl-%s'
 DESCRIPTION_BACKUP_FILE = '~/.git_cl_description_backup'
 GIT_INSTRUCTIONS_URL = 'http://code.google.com/p/chromium/wiki/UsingGit'