[Sync] Replacing NULL with nullptr/null throughout sync code.

components/browser_sync/profile_sync_service_autofill_unittest.cc

 // Copyright 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 222 matching lines @@
       const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
       const scoped_refptr<base::SingleThreadTaskRunner>& db_thread)
       : TokenWebData(ui_thread, db_thread) {}
 
   bool IsDatabaseLoaded() override { return true; }
 
   AutofillWebDataService::Handle GetAllTokens(
       WebDataServiceConsumer* consumer) override {
     // TODO(tim): It would be nice if WebDataService was injected on
     // construction of ProfileOAuth2TokenService rather than fetched by
-    // Initialize so that this isn't necessary (we could pass a NULL service).
+    // Initialize so that this isn't necessary (we could pass a null service).
     // We currently do return it via EXPECT_CALLs, but without depending on
     // order-of-initialization (which seems way more fragile) we can't tell
     // which component is asking at what time, and some components in these
     // Autofill tests require a WebDataService.
     return 0;
   }
 
  private:
   ~TokenWebDataServiceFake() override {}
 
   DISALLOW_COPY_AND_ASSIGN(TokenWebDataServiceFake);
 };
 
 class WebDataServiceFake : public AutofillWebDataService {
  public:
   WebDataServiceFake(
       const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
       const scoped_refptr<base::SingleThreadTaskRunner>& db_thread)
       : AutofillWebDataService(ui_thread, db_thread),
-        web_database_(NULL),
-        autocomplete_syncable_service_(NULL),
-        autofill_profile_syncable_service_(NULL),
+        web_database_(nullptr),
+        autocomplete_syncable_service_(nullptr),
+        autofill_profile_syncable_service_(nullptr),
         syncable_service_created_or_destroyed_(
             base::WaitableEvent::ResetPolicy::AUTOMATIC,
             base::WaitableEvent::InitialState::NOT_SIGNALED),
         db_thread_(db_thread),
         ui_thread_(ui_thread) {}
 
   void SetDatabase(WebDatabase* web_database) { web_database_ = web_database; }
 
   void StartSyncableService() {
     // The |autofill_profile_syncable_service_| must be constructed on the DB
@@ skipping 67 matching lines @@
     autocomplete_syncable_service_ =
         AutocompleteSyncableService::FromWebDataService(this);
     autofill_profile_syncable_service_ =
         AutofillProfileSyncableService::FromWebDataService(this);
 
     syncable_service_created_or_destroyed_.Signal();
   }
 
   void DestroySyncableService() {
     ASSERT_TRUE(db_thread_->RunsTasksOnCurrentThread());
-    autocomplete_syncable_service_ = NULL;
-    autofill_profile_syncable_service_ = NULL;
+    autocomplete_syncable_service_ = nullptr;
+    autofill_profile_syncable_service_ = nullptr;
     backend_.reset();
     syncable_service_created_or_destroyed_.Signal();
   }
 
   WebDatabase* web_database_;
   AutocompleteSyncableService* autocomplete_syncable_service_;
   AutofillProfileSyncableService* autofill_profile_syncable_service_;
   std::unique_ptr<autofill::AutofillWebDataBackend> backend_;
 
   WaitableEvent syncable_service_created_or_destroyed_;
@@ skipping 1067 matching lines @@
       .WillOnce(DoAll(LoadAutofillProfiles(profile_returner), Return(true)));
 
   std::vector<AutofillProfile> sync_profiles;
   sync_profiles.push_back(sync_profile);
   AddAutofillHelper<AutofillProfile> add_autofill(this, sync_profiles);
   EXPECT_CALL(personal_data_manager(), Refresh());
   StartSyncService(add_autofill.callback(), false, AUTOFILL_PROFILE);
   ASSERT_TRUE(add_autofill.success());
 
   AutofillProfileChange change(AutofillProfileChange::REMOVE,
-                               sync_profile.guid(), NULL);
+                               sync_profile.guid(), nullptr);
   web_data_service()->OnAutofillProfileChanged(change);
 
   std::vector<AutofillProfile> new_sync_profiles;
   ASSERT_TRUE(
       GetAutofillProfilesFromSyncDBUnderProfileNode(&new_sync_profiles));
   ASSERT_EQ(0U, new_sync_profiles.size());
 }
 
 TEST_F(ProfileSyncServiceAutofillTest, ServerChangeRace) {
   // Once for MergeDataAndStartSyncing() and twice for ProcessSyncChanges(), via
@@ skipping 47 matching lines @@
   ASSERT_TRUE(GetAutofillEntriesFromSyncDB(&sync_entries, &sync_profiles));
   EXPECT_EQ(3U, sync_entries.size());
   EXPECT_EQ(0U, sync_profiles.size());
   for (size_t i = 0; i < sync_entries.size(); i++) {
     DVLOG(1) << "Entry " << i << ": " << sync_entries[i].key().name() << ", "
              << sync_entries[i].key().value();
   }
 }
 
 }  // namespace browser_sync