Add landmine to clober mac and win to fix bad dependency for create_nmf.py

build/get_landmines.py

 #!/usr/bin/env python
 # Copyright 2013 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.
 
 """
 This file emits the list of reasons why a particular build needs to be clobbered
 (or a list of 'landmines').
 """
 
@@ skipping 19 matching lines @@
       builder() == 'ninja'):
     print 'Need to clobber winja goma due to backend cwd cache fix.'
   if platform() == 'android':
     print 'Clobber: Resources removed in r195014 require clobber.'
   if platform() == 'win' and builder() == 'ninja':
     print 'Compile on cc_unittests fails due to symbols removed in r185063.'
   if platform() == 'linux' and builder() == 'ninja':
     print 'Builders switching from make to ninja will clobber on this.'
   if platform() == 'mac':
     print 'Switching from bundle to unbundled dylib (issue 14743002).'
+  if platform() in ('win', 'mac'):
+    print ('Improper dependency for create_nmf.py broke in r240802, '
+           'fixed in r240860.')
   if (platform() == 'win' and builder() == 'ninja' and
       gyp_msvs_version() == '2012' and
       gyp_defines().get('target_arch') == 'x64' and
       gyp_defines().get('dcheck_always_on') == '1'):
     print "Switched win x64 trybots from VS2010 to VS2012."
   print 'Need to clobber everything due to an IDL change in r154579 (blink)'
 
 
 def main():
   parser = optparse.OptionParser()
   parser.add_option('-t', '--target',
                     help=='Target for which the landmines have to be emitted')
 
   options, args = parser.parse_args()
 
   if args:
     parser.error('Unknown arguments %s' % args)
 
   print_landmines(options.target)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())