Enable per thread heap for database thread

third_party/WebKit/Source/modules/webdatabase/SQLResultSet.cpp

 /*
  * Copyright (C) 2007 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
@@ skipping 23 matching lines @@
 
 namespace blink {
 
 SQLResultSet::SQLResultSet()
     : m_rows(SQLResultSetRowList::create())
     , m_insertId(0)
     , m_rowsAffected(0)
     , m_insertIdSet(false)
     , m_isValid(false)
 {
+    DCHECK(isMainThread());
 }
 
 DEFINE_TRACE(SQLResultSet)
 {
     visitor->trace(m_rows);
 }
 
 int64_t SQLResultSet::insertId(ExceptionState& exceptionState) const
 {
     // 4.11.4 - Return the id of the last row inserted as a result of the query
@@ skipping 23 matching lines @@
     m_insertIdSet = true;
 }
 
 void SQLResultSet::setRowsAffected(int count)
 {
     m_rowsAffected = count;
     m_isValid = true;
 }
 
 } // namespace blink