Refactoring: Remove global configs in release scripts.

tools/push-to-trunk/chromium_roll.py

 #!/usr/bin/env python
 # Copyright 2014 the V8 project 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 argparse
 import os
 import sys
 
 from common_includes import *
 
-CHROMIUM = "CHROMIUM"
-
-CONFIG = {
-  PERSISTFILE_BASENAME: "/tmp/v8-chromium-roll-tempfile",
-}
-
 
 class Preparation(Step):
   MESSAGE = "Preparation."
 
   def RunStep(self):
     # Update v8 remote tracking branches.
     self.GitFetchOrigin()
 
 
 class DetectLastPush(Step):
@@ skipping 81 matching lines @@
 
 class CleanUp(Step):
   MESSAGE = "Done!"
 
   def RunStep(self):
     print("Congratulations, you have successfully rolled the push r%s it into "
           "Chromium. Please don't forget to update the v8rel spreadsheet."
           % self["trunk_revision"])
 
     # Clean up all temporary files.
-    Command("rm", "-f %s*" % self._config[PERSISTFILE_BASENAME])
+    Command("rm", "-f %s*" % self._config["PERSISTFILE_BASENAME"])
 
 
 class ChromiumRoll(ScriptsBase):
   def _PrepareOptions(self, parser):
     parser.add_argument("-c", "--chromium", required=True,
                         help=("The path to your Chromium src/ "
                               "directory to automate the V8 roll."))
     parser.add_argument("-l", "--last-push",
                         help="The git commit ID of the last push to trunk.")
     parser.add_argument("--use-commit-queue",
                         help="Check the CQ bit on upload.",
                         default=False, action="store_true")
 
   def _ProcessOptions(self, options):  # pragma: no cover
     if not options.author or not options.reviewer:
       print "A reviewer (-r) and an author (-a) are required."
       return False
 
     options.requires_editor = False
     options.force = True
     options.manual = False
     return True
 
+  def _Config(self):
+    return {
+      "PERSISTFILE_BASENAME": "/tmp/v8-chromium-roll-tempfile",
+    }
+
   def _Steps(self):
     return [
       Preparation,
       DetectLastPush,
       DetermineV8Sheriff,
       SwitchChromium,
       UpdateChromiumCheckout,
       UploadCL,
       SwitchV8,
       CleanUp,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
-  sys.exit(ChromiumRoll(CONFIG).Run())
+  sys.exit(ChromiumRoll().Run())