Move InterpolationEffect to oilpan's heap

Source/core/animation/InterpolationEffect.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/animation/InterpolationEffect.h"
 
 namespace WebCore {
 
 PassOwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation> > > InterpolationEffect::getActiveInterpolations(double fraction, double iterationDuration) const
@@ skipping 14 matching lines @@
     }
 
     return adoptPtrWillBeNoop(result);
 }
 
 void InterpolationEffect::InterpolationRecord::trace(Visitor* visitor)
 {
     visitor->trace(m_interpolation);
 }
 
+void InterpolationEffect::trace(Visitor* visitor)
+{
+#if ENABLE_OILPAN
+    visitor->trace(m_interpolations);
+#endif
 }
+
+}