Introduce DEFINE_AX_OBJECT_TYPE_CASTS to replace manual toFoo() in accessibility child class

Source/core/accessibility/AXTableRow.h

 /*
  * Copyright (C) 2008 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 46 matching lines @@
 protected:
     virtual AccessibilityRole determineAccessibilityRole() OVERRIDE;
 
 private:
     int m_rowIndex;
 
     virtual AXObject* observableObject() const OVERRIDE;
     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
 };
 
-inline AXTableRow* toAXTableRow(AXObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableRow());
-    return static_cast<AXTableRow*>(object);
-}
-
-inline const AXTableRow* toAXTableRow(const AXObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableRow());
-    return static_cast<const AXTableRow*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toAXTableRow(const AXTableRow*);
+DEFINE_AX_OBJECT_TYPE_CASTS(AXTableRow, isTableRow());
 
 } // namespace WebCore
 
 #endif // AXTableRow_h