[Password Manager Cleanup] Replaces NULL -> nullptr.

components/password_manager/core/browser/affiliation_service_unittest.cc

 // Copyright 2014 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.
 
 // Note: This test focuses on functionality implemented in AffiliationService
 // itself. More thorough The AffiliationBackend is tested in-depth separarately.
 
 #include "components/password_manager/core/browser/affiliation_service.h"
 
 #include "base/files/file_path.h"
@@ skipping 52 matching lines @@
   ScopedFakeAffiliationAPI* fake_affiliation_api() {
     return &fake_affiliation_api_;
   }
 
  private:
   // testing::Test:
   void SetUp() override {
     base::FilePath database_path;
     ASSERT_TRUE(CreateTemporaryFile(&database_path));
     service_.reset(new AffiliationService(background_task_runner()));
-    service_->Initialize(NULL, database_path);
+    service_->Initialize(nullptr, database_path);
     // Note: the background task runner is purposely not pumped here, so that
     // the tests also verify that the service can be used synchronously right
     // away after having been constructed.
     fake_affiliation_api_.AddTestEquivalenceClass(
         GetTestEquivalenceClassAlpha());
   }
 
   void TearDown() override {
     // The service uses DeleteSoon to asynchronously destroy its backend. Pump
     // the background thread to make sure destruction actually takes place.
@@ skipping 61 matching lines @@
   background_task_runner()->RunUntilIdle();
   ASSERT_TRUE(fake_affiliation_api()->HasPendingRequest());
   fake_affiliation_api()->IgnoreNextRequest();
 
   mock_consumer()->ExpectFailure();
   main_task_runner()->RunUntilIdle();
   testing::Mock::VerifyAndClearExpectations(mock_consumer());
 }
 
 }  // namespace password_manager