Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/webdatabase/DatabaseManager.cpp

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 180 matching lines @@
 
     RefPtr<DatabaseBackendBase> backend = m_server->openDatabase(backendContext, type, name, expectedVersion,
         displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
 
     if (!backend) {
         ASSERT(error != DatabaseError::None);
 
         switch (error) {
         case DatabaseError::GenericSecurityError:
             logOpenDatabaseError(context, name);
-            return 0;
+            return nullptr;
 
         case DatabaseError::InvalidDatabaseState:
             logErrorMessage(context, errorMessage);
-            return 0;
+            return nullptr;
 
         default:
             ASSERT_NOT_REACHED();
         }
     }
 
     return backend.release();
 }
 
 PassRefPtr<Database> DatabaseManager::openDatabase(ExecutionContext* context,
     const String& name, const String& expectedVersion, const String& displayName,
     unsigned long estimatedSize, PassOwnPtr<DatabaseCallback> creationCallback,
     DatabaseError& error, String& errorMessage)
 {
     ASSERT(error == DatabaseError::None);
 
     bool setVersionInNewDatabase = !creationCallback;
     RefPtr<DatabaseBackendBase> backend = openDatabaseBackend(context, DatabaseType::Async, name,
         expectedVersion, displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
     if (!backend)
-        return 0;
+        return nullptr;
 
     RefPtr<Database> database = Database::create(context, backend);
 
     RefPtr<DatabaseContext> databaseContext = databaseContextFor(context);
     databaseContext->setHasOpenDatabases();
     DatabaseClient::from(context)->didOpenDatabase(database, context->securityOrigin()->host(), name, expectedVersion);
 
     if (backend->isNew() && creationCallback.get()) {
         WTF_LOG(StorageAPI, "Scheduling DatabaseCreationCallbackTask for database %p\n", database.get());
         database->m_executionContext->postTask(DatabaseCreationCallbackTask::create(database, creationCallback));
     }
 
     ASSERT(database);
     return database.release();
 }
 
 PassRefPtr<DatabaseSync> DatabaseManager::openDatabaseSync(ExecutionContext* context,
     const String& name, const String& expectedVersion, const String& displayName,
     unsigned long estimatedSize, PassOwnPtr<DatabaseCallback> creationCallback,
     DatabaseError& error, String& errorMessage)
 {
     ASSERT(context->isContextThread());
     ASSERT(error == DatabaseError::None);
 
     bool setVersionInNewDatabase = !creationCallback;
     RefPtr<DatabaseBackendBase> backend = openDatabaseBackend(context, DatabaseType::Sync, name,
         expectedVersion, displayName, estimatedSize, setVersionInNewDatabase, error, errorMessage);
     if (!backend)
-        return 0;
+        return nullptr;
 
     RefPtr<DatabaseSync> database = DatabaseSync::create(context, backend);
 
     if (backend->isNew() && creationCallback.get()) {
         WTF_LOG(StorageAPI, "Invoking the creation callback for database %p\n", database.get());
         creationCallback->handleEvent(database.get());
     }
 
     ASSERT(database);
     return database.release();
@@ skipping 23 matching lines @@
     if (databaseContext)
         m_server->interruptAllDatabasesForContext(databaseContext->backend().get());
 }
 
 void DatabaseManager::logErrorMessage(ExecutionContext* context, const String& message)
 {
     context->addConsoleMessage(StorageMessageSource, ErrorMessageLevel, message);
 }
 
 } // namespace WebCore