Drop --clone from skia

gm/rebaseline_server/compare_rendered_pictures_test.py

 #!/usr/bin/python
 
 """
 Copyright 2014 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 Test compare_rendered_pictures.py
 
@@ skipping 60 matching lines @@
     for skpname, redvalue in skpdict.iteritems():
       self._run_skpmaker(
           output_path=os.path.join(out_path, skpname), red=redvalue)
 
     # TODO(epoger): Add --mode tile 256 256 --writeWholeImage to the unittest,
     # and fix its result!  (imageURLs within whole-image entries are wrong when
     # I tried adding that)
     binary = self.find_path_to_program('render_pictures')
     return subprocess.check_output([
         binary,
-        '--clone', '1',
         '--config', '8888',
         '-r', out_path,
         '--writeChecksumBasedFilenames',
         '--writeJsonSummaryPath', os.path.join(out_path, 'summary.json'),
         '--writePath', out_path])
 
   def _run_skpmaker(self, output_path, red=0, green=0, blue=0,
                     width=640, height=400):
     """Runs the skpmaker binary to generate SKP with known characteristics.
 
@@ skipping 19 matching lines @@
   """Mock version of BaseComparisons.get_timestamp() for testing."""
   return 12345678
 
 
 def main():
   base_unittest.main(CompareRenderedPicturesTest)
 
 
 if __name__ == '__main__':
   main()