Make render_pdfs not crash webpages_playback script

tools/skp/webpages_playback.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.
 
 """Archives or replays webpages and creates SKPs in a Google Storage location.
 
 To archive webpages and store SKP files (archives should be rarely updated):
 
 cd ../buildbot/slave/skia_slave_scripts
@@ skipping 277 matching lines @@
     print '\n\n=======Capturing SKP files took %s seconds=======\n\n' % (
         time.time() - start_time)
 
     if self._skia_tools:
       render_pictures_cmd = [
           os.path.join(self._skia_tools, 'render_pictures'),
           '-r', self._local_skp_dir
       ]
       render_pdfs_cmd = [
           os.path.join(self._skia_tools, 'render_pdfs'),
-          self._local_skp_dir
+          '-r', self._local_skp_dir
       ]
 
       for tools_cmd in (render_pictures_cmd, render_pdfs_cmd):
         print '\n\n=======Running %s=======' % ' '.join(tools_cmd)
         proc = subprocess.Popen(tools_cmd)
         (code, _) = shell_utils.log_process_after_completion(proc, echo=False)
         if code != 0:
           raise Exception('%s failed!' % ' '.join(tools_cmd))
 
       if not self._non_interactive:
@@ skipping 140 matching lines @@
       default=None)
   option_parser.add_option(
       '', '--non-interactive', action='store_true',
       help='Runs the script without any prompts. If this flag is specified and '
            '--skia_tools is specified then the debugger is not run.',
       default=False)
   options, unused_args = option_parser.parse_args()
 
   playback = SkPicturePlayback(options)
   sys.exit(playback.Run())