Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/webdatabase/SQLStatementSync.cpp

 /*
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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.
@@ skipping 46 matching lines @@
     SQLiteDatabase* database = &db->sqliteDatabase();
 
     SQLiteStatement statement(*database, m_statement);
     int result = statement.prepare();
     if (result != SQLResultOk) {
         if (result == SQLResultInterrupt)
             exceptionState.throwDOMException(SQLDatabaseError, "Connection to the database interrupted.");
         else
             exceptionState.throwDOMException(SyntaxError, "Could not prepare statement.");
         db->setLastErrorMessage("could not prepare statement", result, database->lastErrorMsg());
-        return 0;
+        return nullptr;
     }
 
     if (statement.bindParameterCount() != m_arguments.size()) {
         if (db->isInterrupted())
             exceptionState.throwDOMException(SQLDatabaseError, "Connection to the database interrupted.");
         else
             exceptionState.throwDOMException(SyntaxError, "Number of '?'s in statement string (" + String::number(statement.bindParameterCount()) + ") does not match the arguments provided (" + String::number(m_arguments.size()) + ").");
         db->setLastErrorMessage("number of '?'s in statement string does not match argument count");
-        return 0;
+        return nullptr;
     }
 
     for (unsigned i = 0; i < m_arguments.size(); ++i) {
         result = statement.bindValue(i + 1, m_arguments[i]);
         if (result == SQLResultFull) {
             exceptionState.throwDOMException(QuotaExceededError, SQLError::quotaExceededErrorMessage);
             db->setLastErrorMessage("there was not enough remaining storage space");
-            return 0;
+            return nullptr;
         }
 
         if (result != SQLResultOk) {
             exceptionState.throwDOMException(SQLDatabaseError, "Could not bind value.");
             db->setLastErrorMessage("could not bind value", result, database->lastErrorMsg());
-            return 0;
+            return nullptr;
         }
     }
 
     RefPtr<SQLResultSet> resultSet = SQLResultSet::create();
 
     // Step so we can fetch the column names.
     result = statement.step();
     if (result == SQLResultRow) {
         int columnCount = statement.columnCount();
         SQLResultSetRowList* rows = resultSet->rows();
 
         for (int i = 0; i < columnCount; i++)
             rows->addColumn(statement.getColumnName(i));
 
         do {
             for (int i = 0; i < columnCount; i++)
                 rows->addResult(statement.getColumnValue(i));
 
             result = statement.step();
         } while (result == SQLResultRow);
 
         if (result != SQLResultDone) {
             exceptionState.throwDOMException(SQLDatabaseError, "Could not iterate results.");
             db->setLastErrorMessage("could not iterate results", result, database->lastErrorMsg());
-            return 0;
+            return nullptr;
         }
     } else if (result == SQLResultDone) {
         // Didn't find anything, or was an insert.
         if (db->lastActionWasInsert())
             resultSet->setInsertId(database->lastInsertRowID());
     } else if (result == SQLResultFull) {
         // Quota error, the delegate will be asked for more space and this statement might be re-run.
         exceptionState.throwDOMException(QuotaExceededError, SQLError::quotaExceededErrorMessage);
         db->setLastErrorMessage("there was not enough remaining storage space");
-        return 0;
+        return nullptr;
     } else if (result == SQLResultConstraint) {
         exceptionState.throwDOMException(ConstraintError, "A constraint was violated.");
         db->setLastErrorMessage("statement failed due to a constraint failure");
-        return 0;
+        return nullptr;
     } else {
         exceptionState.throwDOMException(SQLDatabaseError, "Could not execute statement.");
         db->setLastErrorMessage("could not execute statement", result, database->lastErrorMsg());
-        return 0;
+        return nullptr;
     }
 
     resultSet->setRowsAffected(database->lastChanges());
     return resultSet.release();
 }
 
 } // namespace WebCore