Deprecate ChangeLog on bleeding_edge.

tools/push-to-trunk/common_includes.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 66 matching lines @@
 
 def Fill80(line):
   # Replace tabs and remove surrounding space.
   line = re.sub(r"\t", r"        ", line.strip())
 
   # Format with 8 characters indentation and line width 80.
   return textwrap.fill(line, width=80, initial_indent="        ",
                        subsequent_indent="        ")
 
 
-def GetLastChangeLogEntries(change_log_file):
-  result = []
-  for line in LinesInFile(change_log_file):
-    if re.search(r"^\d{4}-\d{2}-\d{2}:", line) and result: break
-    result.append(line)
-  return "".join(result)
-
-
 def MakeComment(text):
   return MSub(r"^( ?)", "#", text)
 
 
 def StripComments(text):
   # Use split not splitlines to keep terminal newlines.
   return "\n".join(filter(lambda x: not x.startswith("#"), text.split("\n")))
 
 
 def MakeChangeLogBody(commit_messages, auto_format=False):
@@ skipping 456 matching lines @@
     steps = []
     for (number, step_class) in enumerate(step_classes):
       steps.append(MakeStep(step_class, number, self._state, self._config,
                             options, self._side_effect_handler))
     for step in steps[options.step:]:
       step.Run()
     return 0
 
   def Run(self, args=None):
     return self.RunSteps(self._Steps(), args)