Web SQL: Remove unnecessary abstraction.

Source/modules/webdatabase/SQLStatementBackend.h

 /*
  * Copyright (C) 2007, 2013 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 11 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #ifndef SQLStatementBackend_h
 #define SQLStatementBackend_h
 
 #include "modules/webdatabase/sqlite/SQLValue.h"
-#include "modules/webdatabase/AbstractSQLStatementBackend.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class AbstractSQLStatement;
 class DatabaseBackend;
 class SQLErrorData;
+class SQLResultSet;
+class SQLStatement;
 class SQLTransactionBackend;
 
-class SQLStatementBackend FINAL : public AbstractSQLStatementBackend {
+class SQLStatementBackend FINAL : public ThreadSafeRefCountedWillBeGarbageCollectedFinalized<SQLStatementBackend> {
 public:
-    static PassRefPtrWillBeRawPtr<SQLStatementBackend> create(PassOwnPtrWillBeRawPtr<AbstractSQLStatement>,
+    static PassRefPtrWillBeRawPtr<SQLStatementBackend> create(PassOwnPtrWillBeRawPtr<SQLStatement>,
         const String& sqlStatement, const Vector<SQLValue>& arguments, int permissions);
-    virtual void trace(Visitor*) OVERRIDE;
+    void trace(Visitor*);
 
     bool execute(DatabaseBackend*);
     bool lastExecutionFailedDueToQuota() const;
 
     bool hasStatementCallback() const { return m_hasCallback; }
     bool hasStatementErrorCallback() const { return m_hasErrorCallback; }
 
     void setVersionMismatchedError(DatabaseBackend*);
 
-    AbstractSQLStatement* frontend();
-    virtual SQLErrorData* sqlError() const OVERRIDE;
-    virtual SQLResultSet* sqlResultSet() const OVERRIDE;
+    SQLStatement* frontend();
+    SQLErrorData* sqlError() const;
+    SQLResultSet* sqlResultSet() const;
 
 private:
-    SQLStatementBackend(PassOwnPtrWillBeRawPtr<AbstractSQLStatement>, const String& statement,
+    SQLStatementBackend(PassOwnPtrWillBeRawPtr<SQLStatement>, const String& statement,
         const Vector<SQLValue>& arguments, int permissions);
 
     void setFailureDueToQuota(DatabaseBackend*);
     void clearFailureDueToQuota();
 
-    OwnPtrWillBeMember<AbstractSQLStatement> m_frontend;
+    OwnPtrWillBeMember<SQLStatement> m_frontend;
     String m_statement;
     Vector<SQLValue> m_arguments;
     bool m_hasCallback;
     bool m_hasErrorCallback;
 
     OwnPtr<SQLErrorData> m_error;
     RefPtrWillBeMember<SQLResultSet> m_resultSet;
 
     int m_permissions;
 };
 
 } // namespace blink
 
 #endif // SQLStatementBackend_h