[Password Manager Cleanup] Replaces NULL -> nullptr.

chrome/browser/password_manager/password_store_x_unittest.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/prefs/pref_service.h"
@@ skipping 214 matching lines @@
     std::string action = base::StringPrintf("http://%zu.%s.com/action",
                                             i, domain);
     password_manager::PasswordFormData data = {
         PasswordForm::SCHEME_HTML,
         realm.c_str(),
         origin.c_str(),
         action.c_str(),
         L"submit_element",
         L"username_element",
         L"password_element",
-        autofillable ? L"username_value" : NULL,
-        autofillable ? L"password_value" : NULL,
+        autofillable ? L"username_value" : nullptr,
+        autofillable ? L"password_value" : nullptr,
         autofillable,
         false,
         static_cast<double>(i + 1)};
     forms->push_back(CreatePasswordFormFromDataForTesting(data).release());
   }
 }
 
 PasswordStoreChangeList AddChangeForForm(const PasswordForm& form) {
   return PasswordStoreChangeList(
       1, PasswordStoreChange(PasswordStoreChange::ADD, form));
@@ skipping 19 matching lines @@
     return temp_dir_.path().Append(FILE_PATH_LITERAL("login_test"));
   }
 
   PasswordStoreX::NativeBackend* GetBackend() {
     switch (GetParam()) {
       case FAILING_BACKEND:
         return new FailingBackend();
       case WORKING_BACKEND:
         return new MockBackend();
       default:
-        return NULL;
+        return nullptr;
     }
   }
 
   content::TestBrowserThreadBundle thread_bundle_;
 
   base::ScopedTempDir temp_dir_;
 };
 
 ACTION(STLDeleteElements0) {
   STLDeleteContainerPointers(arg0.begin(), arg0.end());
@@ skipping 172 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(NoBackend,
                         PasswordStoreXTest,
                         testing::Values(NO_BACKEND));
 INSTANTIATE_TEST_CASE_P(FailingBackend,
                         PasswordStoreXTest,
                         testing::Values(FAILING_BACKEND));
 INSTANTIATE_TEST_CASE_P(WorkingBackend,
                         PasswordStoreXTest,
                         testing::Values(WORKING_BACKEND));