Revert of Gerrit git cl: temporary disable cc option on upload. (patchset #1 id:1 of https://codereview.chromium.org/1895863002/ )

Reason for revert:
We've whitelisted cc-ed emails in Gerrit, and so let's try setting cc= again.

Original issue's description:
> Gerrit git cl: temporary disable cc option on upload.
> 
> Gerrit doesn't allow arbitrary non-member emails for now,
> thus removign this feature until either Gerrit allows it,
> or we have a per-repo opt-in way.
> 
> TBR=andybons@chromium.org
> BUG=604377
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=299988

TBR=andybons@chromium.org,sergiyb@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=604377

Review-Url: https://codereview.chromium.org/2034143002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300694 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/git_cl.py b/git_cl.py
index a08141b..231b1c4 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2498,10 +2498,7 @@
       cc.extend(options.cc)
     cc = filter(None, cc)
     if cc:
-      # refspec_opts.extend('cc=' + email.strip() for email in cc)
-      # TODO(tandrii): enable this back. http://crbug.com/604377
-      print('WARNING: Gerrit doesn\'t yet support cc-ing arbitrary emails.\n'
-            '         Ignoring cc-ed emails. See http://crbug.com/604377.')
+      refspec_opts.extend('cc=' + email.strip() for email in cc)
 
     if change_desc.get_reviewers():
       refspec_opts.extend('r=' + email.strip()