Oilpan: move SVG property hierarchy to the heap.

Source/core/animation/animatable/AnimatableFilterOperations.cpp

 /*
  * Copyright (C) 2013 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 36 matching lines @@
         return defaultInterpolateTo(this, value, fraction);
 
     const AnimatableFilterOperations* target = toAnimatableFilterOperations(value);
     FilterOperations result;
     size_t fromSize = operations().size();
     size_t toSize = target->operations().size();
     size_t size = std::max(fromSize, toSize);
     for (size_t i = 0; i < size; i++) {
         FilterOperation* from = (i < fromSize) ? m_operations.operations()[i].get() : 0;
         FilterOperation* to = (i < toSize) ? target->m_operations.operations()[i].get() : 0;
-        RefPtr<FilterOperation> blendedOp = FilterOperation::blend(from, to, fraction);
+        RefPtrWillBeRawPtr<FilterOperation> blendedOp = FilterOperation::blend(from, to, fraction);
         if (blendedOp)
             result.operations().append(blendedOp);
         else
             ASSERT_NOT_REACHED();
     }
     return AnimatableFilterOperations::create(result);
 }
 
 bool AnimatableFilterOperations::equalTo(const AnimatableValue* value) const
 {
     return operations() == toAnimatableFilterOperations(value)->operations();
 }
 
+void AnimatableFilterOperations::trace(Visitor* visitor)
+{
+    visitor->trace(m_operations);
+    AnimatableValue::trace(visitor);
 }
+
+} // namespace blink