Add git-reup and friends

git_freezer.py

Index: git_freezer.py
diff --git a/git_freezer.py b/git_freezer.py
index 6e28b3e342b066f582fd46c48153f90a8038ebf9..075ebd65e3ff1ac0aeef8b6e91c4fcf45ab0a69f 100755
--- a/git_freezer.py
+++ b/git_freezer.py
@@ -1,4 +1,8 @@
 #!/usr/local/bin/python
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 import sys
 import re
 import optparse
@@ -6,7 +10,7 @@ import optparse
 import subcommand
 import subprocess2
 
-from git_common import run, stream
+from git_common import run, run_stream
 
 FREEZE = 'FREEZE'
 SECTIONS = {
@@ -38,7 +42,7 @@ def freeze():
 
 def thaw():
   took_action = False
-  for sha in (s.strip() for s in stream('rev-list', 'HEAD').xreadlines()):
+  for sha in (s.strip() for s in run_stream('rev-list', 'HEAD').xreadlines()):
     msg = run('show', '--format=%f%b', '-s', 'HEAD')
     match = MATCHER.match(msg)
     if not match: