InlinedVisitor: Migrate animation to use inlined tracing

Source/core/animation/animatable/AnimatableLengthPoint.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 29 matching lines @@
         AnimatableValue::interpolate(this->x(), lengthPoint->x(), fraction),
         AnimatableValue::interpolate(this->y(), lengthPoint->y(), fraction));
 }
 
 bool AnimatableLengthPoint::equalTo(const AnimatableValue* value) const
 {
     const AnimatableLengthPoint* lengthPoint = toAnimatableLengthPoint(value);
     return x()->equals(lengthPoint->x()) && y()->equals(lengthPoint->y());
 }
 
-void AnimatableLengthPoint::trace(Visitor* visitor)
+DEFINE_TRACE(AnimatableLengthPoint)
 {
     visitor->trace(m_x);
     visitor->trace(m_y);
     AnimatableValue::trace(visitor);
 }
 
 }