Revert 209515 "Reland http://crrev.com/209278"

trunk/src/net/third_party/nss/ssl/bodge/secure_memcmp.c

 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
@@ skipping 39 matching lines @@
     const unsigned char *b = (const unsigned char*) ib;
     size_t i;
     unsigned char r = 0;
 
     for (i = 0; i < n; ++i) {
         r |= *a++ ^ *b++;
     }
 
     return r;
 }