Temporarily make lastchange use only the git hash.

build/util/lastchange.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 lastchange.py -- Chromium revision fetching utility.
 """
 
 import re
@@ skipping 89 matching lines @@
     A VersionInfo object or None on error.
   """
   hsh = ''
   proc = RunGitCommand(directory, ['rev-parse', 'HEAD'])
   if proc:
     output = proc.communicate()[0].strip()
     if proc.returncode == 0 and output:
       hsh = output
   if not hsh:
     return None
+  return VersionInfo('git', hsh)
+  # TODO(agable): Re-enable this code after the lastchange value can accept
+  # strings longer than 64 characters. See crbug.com/406783.
+  # The following code is unreachable.

[Ryan Tseng, 2014/08/23 18:39:32]

We can just delete this? Or pylint will explode (or maybe pylint isn't run here)

[agable, 2014/08/23 18:42:36]

Yeah I suppose I can delete the code and just reland it later.

   pos = ''
   proc = RunGitCommand(directory, ['show', '-s', '--format=%B', 'HEAD'])
   if proc:
     output = proc.communicate()[0]
     if proc.returncode == 0 and output:
       for line in reversed(output.splitlines()):
         if line.startswith('Cr-Commit-Position:'):
           pos = line.rsplit()[-1].strip()
   if not pos:
     return VersionInfo('git', hsh)
@@ skipping 170 matching lines @@
       if header:
         WriteIfChanged(header,
                        GetHeaderContents(header, opts.version_macro,
                                          version_info.revision))
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())