Minor C++ fixes found by Clang.

chrome/tools/build/make_version_cc.py

 #!/usr/bin/env python
 
 # Copyright (c) 2009 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.
 
 # Creates chrome_version.cc which contains the definition of the
 # kChromeVersion constant.
 
 import sys
 
 def main(me, args):
   if len(args) != 2:
     print >>sys.stderr, 'usage: %s version.cc version' % me
     return 1
 
   (cc_file, version) = args
 
   contents = '''// automatically generated by %s
 
 namespace chrome {
 
-extern const char kChromeVersion[] = "%s";
+const char kChromeVersion[] = "%s";
 
 }  // namespace chrome
 ''' % (me, version)
 
   output = open(cc_file, 'w')
   output.write(contents)
   output.close()
 
   return 0
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[0], sys.argv[1:]))