Revert of Enable per thread heap for database thread

third_party/WebKit/Source/modules/webdatabase/DatabaseAuthorizer.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 21 matching lines @@
 
 DatabaseAuthorizer* DatabaseAuthorizer::create(const String& databaseInfoTableName)
 {
     return new DatabaseAuthorizer(databaseInfoTableName);
 }
 
 DatabaseAuthorizer::DatabaseAuthorizer(const String& databaseInfoTableName)
     : m_securityEnabled(false)
     , m_databaseInfoTableName(databaseInfoTableName)
 {
-    DCHECK(isMainThread());
-
     reset();
     addWhitelistedFunctions();
 }
 
 void DatabaseAuthorizer::reset()
 {
     m_lastActionWasInsert = false;
     m_lastActionChangedDatabase = false;
     m_permissions = ReadWriteMask;
 }
@@ skipping 364 matching lines @@
 
 int DatabaseAuthorizer::updateDeletesBasedOnTableName(const String& tableName)
 {
     int allow = denyBasedOnTableName(tableName);
     if (allow)
         m_hadDeletes = true;
     return allow;
 }
 
 } // namespace blink