Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGAnimatedInteger.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 14 matching lines @@
  * 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.
  */
 
 #include "config.h"
 #include "core/svg/SVGAnimatedInteger.h"
 
 #include "core/svg/SVGAnimatedIntegerOptionalInteger.h"
+#include "core/svg/SVGElement.h"
 
 namespace blink {
 
 void SVGAnimatedInteger::synchronizeAttribute()
 {
     if (m_parentIntegerOptionalInteger) {
         m_parentIntegerOptionalInteger->synchronizeAttribute();
         return;
     }
 
     SVGAnimatedProperty<SVGInteger>::synchronizeAttribute();
 }
 
+void SVGAnimatedInteger::trace(Visitor* visitor)
+{
+    visitor->trace(m_parentIntegerOptionalInteger);
+    SVGAnimatedProperty<SVGInteger>::trace(visitor);
 }
+
+}