Ensure proper finalization of garbage-collected types.

Source/core/css/CSSBasicShapes.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. 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.
@@ skipping 21 matching lines @@
 
 #include "core/css/CSSValuePool.h"
 #include "core/css/Pair.h"
 #include "platform/Length.h"
 #include "wtf/text/StringBuilder.h"
 
 using namespace WTF;
 
 namespace WebCore {
 
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CSSBasicShape)
+
 static String buildRectangleString(const String& x, const String& y, const String& width, const String& height, const String& radiusX, const String& radiusY, const String& layoutBox)
 {
     const char opening[] = "rectangle(";
     const char separator[] = ", ";
     StringBuilder result;
     // Compute the required capacity in advance to reduce allocations.
     result.reserveCapacity((sizeof(opening) - 1) + (5 * (sizeof(separator) - 1)) + 1 + x.length() + y.length() + width.length() + height.length() + radiusX.length() + radiusY.length() + (layoutBox.isEmpty() ? 0 : layoutBox.length() + 1));
     result.appendLiteral(opening);
     result.append(x);
     result.appendLiteral(separator);
@@ skipping 548 matching lines @@
     visitor->trace(m_left);
     visitor->trace(m_topLeftRadius);
     visitor->trace(m_topRightRadius);
     visitor->trace(m_bottomRightRadius);
     visitor->trace(m_bottomLeftRadius);
     CSSBasicShape::trace(visitor);
 }
 
 } // namespace WebCore