def METHOD_NAME(callgrind_files, srcs):
  """Calls callgrind_annotate over the set of callgrind output
  |callgrind_files| using the sources |srcs| and merges the results
  together."""
  out = ''
  for file in callgrind_files:
    data = subprocess.check_output(['callgrind_annotate', file] + srcs)
    out += '%s\n%s\n' % (data, SECTION_SEPERATOR)
  return out