Remove unnecessary attempts at memory cleaning

net/base/auth.h

 // 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.
 
 #ifndef NET_BASE_AUTH_H__
 #define NET_BASE_AUTH_H__
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 41 matching lines @@
 
   // Set the |username| and |password|.
   void Set(const base::string16& username, const base::string16& password);
 
   // Determines if |this| is equivalent to |other|.
   bool Equals(const AuthCredentials& other) const;
 
   // Returns true if all credentials are empty.
   bool Empty() const;
 
-  // Overwrites the password memory to prevent it from being read if
-  // it's paged out to disk.
-  void Zap();
-
   const base::string16& username() const { return username_; }
   const base::string16& password() const { return password_; }
 
  private:
   // The username to provide, possibly empty. This should be ASCII only to
   // minimize compatibility problems, but arbitrary UTF-16 strings are allowed
   // and will be attempted.
   base::string16 username_;
 
   // The password to provide, possibly empty. This should be ASCII only to
   // minimize compatibility problems, but arbitrary UTF-16 strings are allowed
   // and will be attempted.
   base::string16 password_;
 
   // Intentionally allowing the implicit copy constructor and assignment
   // operators.
 };
 
 // Authentication structures
 enum AuthState {
   AUTH_STATE_DONT_NEED_AUTH,
   AUTH_STATE_NEED_AUTH,
   AUTH_STATE_HAVE_AUTH,
   AUTH_STATE_CANCELED
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_AUTH_H__