[Password Manager Cleanup] Replaces NULL -> nullptr.

chrome/browser/password_manager/password_store_x.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/password_manager/password_store_x.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 221 matching lines @@
   } else if (migrated == 0) {
     // As long as we are able to migrate some passwords, we know the native
     // store is working. But if there is nothing to migrate, the "migration"
     // can succeed even when the native store would fail. In this case we
     // allow a later fallback to the default store. Once any later operation
     // succeeds on the native store, we will no longer allow fallback.
     allow_fallback_ = true;
   } else {
     LOG(WARNING) << "Native password store migration failed! " <<
                  "Falling back on default (unencrypted) store.";
-    backend_.reset(NULL);
+    backend_.reset();
   }
 }
 
 bool PasswordStoreX::allow_default_store() {
   if (allow_fallback_) {
     LOG(WARNING) << "Native password store failed! " <<
                  "Falling back on default (unencrypted) store.";
-    backend_.reset(NULL);
+    backend_.reset();
     // Don't warn again. We'll use the default store because backend_ is NULL.
     allow_fallback_ = false;
   }
   return !backend_.get();
 }
 
 ssize_t PasswordStoreX::MigrateLogins() {
   DCHECK(backend_.get());
   ScopedVector<autofill::PasswordForm> forms;
   bool ok = PasswordStoreDefault::FillAutofillableLogins(&forms) &&
@@ skipping 23 matching lines @@
       // Finally, delete the database file itself. We remove the passwords from
       // it before deleting the file just in case there is some problem deleting
       // the file (e.g. directory is not writable, but file is), which would
       // otherwise cause passwords to re-migrate next (or maybe every) time.
       DeleteAndRecreateDatabaseFile();
     }
   }
   ssize_t result = ok ? forms.size() : -1;
   return result;
 }