Fetch Gerrit cl description from gitiles.

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index bb31fa0ad9705de247d21e310e4e7f4fe16d7e27..0edde48d906f0955243a46589706c46ad28131b5 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2161,8 +2161,10 @@ class _GerritChangelistImpl(_ChangelistCodereviewBase):
     return data['revisions'][data['current_revision']]['_number']
 
   def FetchDescription(self):
-    data = self._GetChangeDetail(['COMMIT_FOOTERS', 'CURRENT_REVISION'])
-    return data['revisions'][data['current_revision']]['commit_with_footers']
+    data = self._GetChangeDetail(['CURRENT_REVISION'])
+    current_rev = data['current_revision']
+    url = data['revisions'][current_rev]['fetch']['http']['url']

[Bons, 2016/04/25 19:23:01]

While it is true that http is a fetch protocol that’s turned on for the chromium
gerrit instance, it has the possibility of not being available (say if we change
the config). May be worth putting a comment in or handling the error if it’s not
there so that users don’t see an opaque failure.

+    return gerrit_util.GetChangeDescriptionFromGitiles(url, current_rev)
 
   def UpdateDescriptionRemote(self, description):
     # TODO(tandrii)