Revert of [Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/svg/SVGAnimatedNumber.cpp

 /*
  * Copyright (C) 2014 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 29 matching lines @@
 void SVGAnimatedNumber::synchronizeAttribute()
 {
     if (m_parentNumberOptionalNumber) {
         m_parentNumberOptionalNumber->synchronizeAttribute();
         return;
     }
 
     SVGAnimatedProperty<SVGNumber>::synchronizeAttribute();
 }
 
-void SVGAnimatedNumber::setParentOptionalNumber(SVGAnimatedNumberOptionalNumber* numberOptionalNumber)
-{
-    m_parentNumberOptionalNumber = numberOptionalNumber;
-}
-
 DEFINE_TRACE(SVGAnimatedNumber)
 {
     visitor->trace(m_parentNumberOptionalNumber);
     SVGAnimatedProperty<SVGNumber>::trace(visitor);
 }
 
 } // namespace blink