Switch chromium roll script to git.

tools/push-to-trunk/test_scripts.py

 #!/usr/bin/env python
 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 988 matching lines @@
                os.path.join(chrome_dir, "DEPS"))
     def WriteDeps():
       TextToFile("Some line\n   \"v8_revision\": \"22624\",\n  some line",
                  os.path.join(chrome_dir, "DEPS"))
 
     expectations = [
       Cmd("git fetch origin", ""),
       Cmd(("git log -1 --format=%H --grep="
            "\"^Version [[:digit:]]*\.[[:digit:]]*\.[[:digit:]]*\" "
            "origin/candidates"), "push_hash\n"),
-      Cmd("git log -1 --format=%B push_hash", self.C_V8_22624_LOG),
       Cmd("git log -1 --format=%s push_hash",
           "Version 3.22.5 (based on bleeding_edge revision r22622)\n"),
       URL("https://chromium-build.appspot.com/p/chromium/sheriff_v8.js",
           "document.write('g_name')"),
       Cmd("git status -s -uno", "", cwd=chrome_dir),
       Cmd("git checkout -f master", "", cwd=chrome_dir),
       Cmd("gclient sync --nohooks", "syncing...", cwd=chrome_dir),
       Cmd("git pull", "", cwd=chrome_dir),
       Cmd("git fetch origin", ""),
-      Cmd("git checkout -b v8-roll-22624", "", cwd=chrome_dir),
-      Cmd("roll-dep v8 22624", "rolled", cb=WriteDeps, cwd=chrome_dir),
+      Cmd("git checkout -b v8-roll-push_hash", "", cwd=chrome_dir),
+      Cmd("roll-dep v8 push_hash", "rolled", cb=WriteDeps, cwd=chrome_dir),
       Cmd(("git commit -am \"Update V8 to version 3.22.5 "
            "(based on bleeding_edge revision r22622).\n\n"
            "Please reply to the V8 sheriff c_name@chromium.org in "
            "case of problems.\n\nTBR=c_name@chromium.org\" "
            "--author \"author@chromium.org <author@chromium.org>\""),
           "", cwd=chrome_dir),
       Cmd("git cl upload --send-mail --email \"author@chromium.org\" -f", "",
           cwd=chrome_dir),
     ]
     self.Expect(expectations)
@@ skipping 788 matching lines @@
 
 Review URL: https://codereview.chromium.org/83173002
 
 ------------------------------------------------------------------------""")
     self.assertEquals(
 """Prepare push to trunk.  Now working on version 3.23.11.
 
 R=danno@chromium.org
 
 Committed: https://code.google.com/p/v8/source/detail?r=17997""", body)