Teach push script to commit with roll account.

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 217 matching lines @@
       args += ["--author", "\"%s <%s>\"" % (author, author)]
     self.Git(MakeArgs(args), **kwargs)
 
   def GitPresubmit(self, **kwargs):
     self.Git("cl presubmit", "PRESUBMIT_TREE_CHECK=\"skip\"", **kwargs)
 
   def GitDCommit(self, **kwargs):
     self.Git(
         "cl dcommit -f --bypass-hooks", retry_on=lambda x: x is None, **kwargs)
 
+  def GitCLLand(self, **kwargs):
+    self.Git(
+        "cl land -f --bypass-hooks", retry_on=lambda x: x is None, **kwargs)
+
   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):
@@ skipping 62 matching lines @@
   def GitSVNFindSVNRev(self, git_hash, branch="", **kwargs):
     return self.Git(MakeArgs(["svn find-rev", git_hash, branch]), **kwargs)
 
   def GitSVNDCommit(self, **kwargs):
     return self.Git("svn dcommit 2>&1", retry_on=lambda x: x is None, **kwargs)
 
   def GitSVNTag(self, version, **kwargs):
     self.Git(("svn tag %s -m \"Tagging version %s\"" % (version, version)),
              retry_on=lambda x: x is None,
              **kwargs)