Re-enable check_licenses.

tools/checklicenses/checklicenses.py

 #!/usr/bin/python
 # Copyright (c) 2011 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.
 
 """Makes sure that all files contain proper licensing information."""
 
 
 import optparse
 import os.path
@@ skipping 235 matching lines @@
     ],
     'third_party/jemalloc': [
         'UNKNOWN',
     ],
     'third_party/lcov': [
         'UNKNOWN',
     ],
     'third_party/lcov/contrib/galaxy/genflat.pl': [
         'GPL (v2 or later)',
     ],
+    'third_party/lcov-1.9/contrib/galaxy/genflat.pl': [
+        'GPL (v2 or later)',
+    ],
     'third_party/leveldatabase/src/util/posix_logger.h': [
         'UNKNOWN',
     ],
     'third_party/libevent': [
         'UNKNOWN',
     ],
     'third_party/libjingle/source/talk': [
         'UNKNOWN',
     ],
     'third_party/libjpeg': [
@@ skipping 247 matching lines @@
     print "http://www.chromium.org/developers/adding-3rd-party-libraries"
     print "for more info how to handle the failure."
     print
     print "Please respect OWNERS of checklicenses.py. Changes violating"
     print "this requirement may be reverted."
 
     sys.exit(1)
 
 
 if '__main__' == __name__:
-  # Script takes 6 minutes when it succeeds, and often times out after 10
-  # minutes. Enable by default when it's fast.
-  print "\nNot running for now because it is slow and flakey\n"
-  print "\nSUCCESS\n"
-  sys.exit(0)
   default_root = os.path.abspath(
       os.path.join(os.path.dirname(__file__), '..', '..'))
   option_parser = optparse.OptionParser()
   option_parser.add_option('--root', default=default_root,
                            dest='base_directory',
                            help='Specifies the repository root. This defaults '
                            'to "../.." relative to the script file, which '
                            'will normally be the repository root.')
   option_parser.add_option('-v', '--verbose', action='store_true',
                            default=False, help='Print debug logging')
   option_parser.add_option('--ignore-suppressions',
                            action='store_true',
                            default=False,
                            help='Ignore path-specific license whitelist.')
   options, args = option_parser.parse_args()
   main(options, args)