Fixed index type in GetOfficialBuildsList.

tools/bisect-builds.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.
 
 """Snapshot Build Bisect Tool
 
 This script bisects a snapshot archive using binary search. It starts at
 a bad revision (it will try to guess HEAD) and asks for a last known-good
 revision. It will then binary search across this revision range by downloading,
@@ skipping 198 matching lines @@
     """Gets the list of official build numbers between self.good_revision and
     self.bad_revision."""
     # Download the revlist and filter for just the range between good and bad.
     minrev = self.good_revision
     maxrev = self.bad_revision
     handle = urllib.urlopen(OFFICIAL_BASE_URL)
     dirindex = handle.read()
     handle.close()
     build_numbers = re.findall(r'<a href="([0-9][0-9].*)/">', dirindex)
     final_list = []
-    start_index = '0'
-    end_index = '0'
+    start_index = 0
+    end_index = 0
     i = 0
 
     parsed_build_numbers = [LooseVersion(x) for x in build_numbers]
     for build_number in sorted(parsed_build_numbers):
       path = OFFICIAL_BASE_URL + '/' + str(build_number) + '/' + \
              self._listing_platform_dir + self.archive_name
       i = i + 1
       try:
         connection = urllib.urlopen(path)
         connection.close()
@@ skipping 442 matching lines @@
     print '  ' + WEBKIT_CHANGELOG_URL % (first_known_bad_webkit_rev,
                                          last_known_good_webkit_rev)
   print 'CHANGELOG URL:'
   if opts.official_builds:
     print OFFICIAL_CHANGELOG_URL % (last_known_good_rev, first_known_bad_rev)
   else:
     print '  ' + CHANGELOG_URL % (last_known_good_rev, first_known_bad_rev)
 
 if __name__ == '__main__':
   sys.exit(main())