Add script to bump up version on bleeding edge.

tools/push-to-trunk/releases.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.
 
 # This script retrieves the history of all V8 branches and trunk revisions and
 # their corresponding Chromium revisions.
 
 # Requires a chromium checkout with branch heads:
 # gclient sync --with_branch_heads
@@ skipping 35 matching lines @@
 REVIEW_LINK_RE = re.compile(r"^Review URL: (.+)$", re.M)
 
 # Expression with three versions (historical) for extracting the v8 revision
 # from the chromium DEPS file.
 DEPS_RE = re.compile(r'^\s*(?:"v8_revision": "'
                       '|\(Var\("googlecode_url"\) % "v8"\) \+ "\/trunk@'
                       '|"http\:\/\/v8\.googlecode\.com\/svn\/trunk@)'
                       '([0-9]+)".*$', re.M)
 
 
-def SortingKey(version):
-  """Key for sorting version number strings: '3.11' > '3.2.1.1'"""
-  version_keys = map(int, version.split("."))
-  # Fill up to full version numbers to normalize comparison.
-  while len(version_keys) < 4:
-    version_keys.append(0)
-  # Fill digits.
-  return ".".join(map("{0:03d}".format, version_keys))
-
-
 def SortBranches(branches):
   """Sort branches with version number names."""
   return sorted(branches, key=SortingKey, reverse=True)
 
 
 def FilterDuplicatesAndReverse(cr_releases):
   """Returns the chromium releases in reverse order filtered by v8 revision
   duplicates.
 
   cr_releases is a list of [cr_rev, v8_rev] reverse-sorted by cr_rev.
@@ skipping 378 matching lines @@
       RetrieveChromiumV8Releases,
       RietrieveChromiumBranches,
       SwitchV8,
       CleanUp,
       WriteOutput,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
   sys.exit(Releases(CONFIG).Run())