Update cpplint.py to r78.

cpplint.py

 #!/usr/bin/python2.4
 #
 # Copyright (c) 2009 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 1053 matching lines @@
         # set ifndef to the header guard presented on the #ifndef line.
         ifndef = linesplit[1]
         ifndef_linenum = linenum
       if not define and linesplit[0] == '#define':
         define = linesplit[1]
     # find the last occurrence of #endif, save entire line
     if line.startswith('#endif'):
       endif = line
       endif_linenum = linenum
 
-  if not ifndef or not define or ifndef != define:
+  if not ifndef:
     error(filename, 0, 'build/header_guard', 5,
           'No #ifndef header guard found, suggested CPP variable is: %s' %
           cppvar)
     return
 
+  if not define:
+    error(filename, 0, 'build/header_guard', 5,
+          'No #define header guard found, suggested CPP variable is: %s' %
+          cppvar)
+    return
+
   # The guard should be PATH_FILE_H_, but we also allow PATH_FILE_H__
   # for backward compatibility.
   if ifndef != cppvar:
     error_level = 0
     if ifndef != cppvar + '_':
       error_level = 5
 
     ParseNolintSuppressions(filename, lines[ifndef_linenum], ifndef_linenum,
                             error)
     error(filename, ifndef_linenum, 'build/header_guard', error_level,
           '#ifndef header guard has wrong style, please use: %s' % cppvar)
 
+  if define != ifndef:
+    error(filename, 0, 'build/header_guard', 5,
+          '#ifndef and #define don\'t match, suggested CPP variable is: %s' %
+          cppvar)
+    return
+
   if endif != ('#endif  // %s' % cppvar):
     error_level = 0
     if endif != ('#endif  // %s' % (cppvar + '_')):
       error_level = 5
 
     ParseNolintSuppressions(filename, lines[endif_linenum], endif_linenum,
                             error)
     error(filename, endif_linenum, 'build/header_guard', error_level,
           '#endif line should be "#endif  // %s"' % cppvar)
 
@@ skipping 2238 matching lines @@
   _cpplint_state.ResetErrorCounts()
   for filename in filenames:
     ProcessFile(filename, _cpplint_state.verbose_level)
   _cpplint_state.PrintErrorCounts()
 
   sys.exit(_cpplint_state.error_count > 0)
 
 
 if __name__ == '__main__':
   main()