Fix releases script after git migration.

tools/push-to-trunk/git_recipes.py

 #!/usr/bin/env python
 # Copyright 2014 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 226 matching lines @@
 
   def GitDiff(self, loc1, loc2, **kwargs):
     return self.Git(MakeArgs(["diff", loc1, loc2]), **kwargs)
 
   def GitPull(self, **kwargs):
     self.Git("pull", **kwargs)
 
   def GitFetchOrigin(self, **kwargs):
     self.Git("fetch origin", **kwargs)
 
-  def GitConvertToSVNRevision(self, git_hash, **kwargs):
-    result = self.Git(MakeArgs(["rev-list", "-n", "1", git_hash]), **kwargs)
-    if not result or not SHA1_RE.match(result):
-      raise GitFailedException("Git hash %s is unknown." % git_hash)
-    log = self.GitLog(n=1, format="%B", git_hash=git_hash, **kwargs)
-    for line in reversed(log.splitlines()):
-      match = ROLL_DEPS_GIT_SVN_ID_RE.match(line.strip())
-      if match:
-        return match.group(1)
-    raise GitFailedException("Couldn't convert %s to SVN." % git_hash)
-
   @Strip
   # Copied from bot_update.py and modified for svn-like numbers only.
   def GetCommitPositionNumber(self, git_hash, **kwargs):
     """Dumps the 'git' log for a specific revision and parses out the commit
     position number.
 
     If a commit position metadata key is found, its number will be returned.
 
     Otherwise, we will search for a 'git-svn' metadata entry. If one is found,
     its SVN revision value is returned.
     """
     git_log = self.GitLog(format='%B', n=1, git_hash=git_hash, **kwargs)
     footer_map = GetCommitMessageFooterMap(git_log)
 
     # Search for commit position metadata
     value = footer_map.get(COMMIT_POSITION_FOOTER_KEY)
     if value:
       match = COMMIT_POSITION_RE.match(value)
       if match:
         return match.group(2)
 
     # Extract the svn revision from 'git-svn' metadata
     value = footer_map.get(GIT_SVN_ID_FOOTER_KEY)
     if value:
       match = GIT_SVN_ID_RE.match(value)
       if match:
         return match.group(1)
     raise GitFailedException("Couldn't determine commit position for %s" %
                              git_hash)