binary_size: Fix jobs number parsing

tools/binary_size/run_binary_size_analysis.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 """Generate a spatial analysis against an arbitrary library.
 
 To use, build the 'binary_size_tool' target. Then run this tool, passing
 in the location of the library to be analyzed along with any other options
 you desire.
@@ skipping 614 matching lines @@
                     'the specified path. Mutually exclusive with --nm-in.')
   parser.add_option('--nm-binary',
                     help='use the specified nm binary to analyze library. '
                     'This is to be used when the nm in the path is not for '
                     'the right architecture or of the right version.')
   parser.add_option('--addr2line-binary',
                     help='use the specified addr2line binary to analyze '
                     'library. This is to be used when the addr2line in '
                     'the path is not for the right architecture or '
                     'of the right version.')
-  parser.add_option('--jobs',
+  parser.add_option('--jobs', type='int',
                     help='number of jobs to use for the parallel '
                     'addr2line processing pool; defaults to 1. More '
                     'jobs greatly improve throughput but eat RAM like '
                     'popcorn, and take several gigabytes each. Start low '
                     'and ramp this number up until your machine begins to '
                     'struggle with RAM. '
                     'This argument is only valid when using --library.')
   parser.add_option('-v', dest='verbose', action='store_true',
                     help='be verbose, printing lots of status information.')
   parser.add_option('--nm-out', metavar='PATH',
@@ skipping 81 matching lines @@
     shutil.copy(os.path.join(d3_src, 'LICENSE'), d3_out)
     shutil.copy(os.path.join(d3_src, 'd3.js'), d3_out)
     shutil.copy(os.path.join(template_src, 'index.html'), opts.destdir)
     shutil.copy(os.path.join(template_src, 'D3SymbolTreeMap.js'), opts.destdir)
 
   print 'Report saved to ' + opts.destdir + '/index.html'
 
 
 if __name__ == '__main__':
   sys.exit(main())