Oilpan: enable eager tracing of common animation objects.

Source/core/animation/InterpolationEffect.h

 // 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.
 
 #ifndef InterpolationEffect_h
 #define InterpolationEffect_h
 
 #include "core/animation/Interpolation.h"
 #include "platform/animation/TimingFunction.h"
 #include "wtf/PassOwnPtr.h"
@@ skipping 10 matching lines @@
 
     void getActiveInterpolations(double fraction, double iterationDuration, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>&) const;
 
     void addInterpolation(PassRefPtrWillBeRawPtr<Interpolation> interpolation, PassRefPtr<TimingFunction> easing, double start, double end, double applyFrom, double applyTo)
     {
         m_interpolations.append(InterpolationRecord::create(interpolation, easing, start, end, applyFrom, applyTo));
     }
 
     void trace(Visitor*);
 
-private:
-    InterpolationEffect()
-    {
-    }
-
     class InterpolationRecord : public NoBaseWillBeGarbageCollectedFinalized<InterpolationRecord> {
     public:
         RefPtrWillBeMember<Interpolation> m_interpolation;
         RefPtr<TimingFunction> m_easing;
         double m_start;
         double m_end;
         double m_applyFrom;
         double m_applyTo;
 
         static PassOwnPtrWillBeRawPtr<InterpolationRecord> create(PassRefPtrWillBeRawPtr<Interpolation> interpolation, PassRefPtr<TimingFunction> easing, double start, double end, double applyFrom, double applyTo)
         {
             return adoptPtrWillBeNoop(new InterpolationRecord(interpolation, easing, start, end, applyFrom, applyTo));
         }
 
         void trace(Visitor*);
 
     private:
         InterpolationRecord(PassRefPtrWillBeRawPtr<Interpolation> interpolation, PassRefPtr<TimingFunction> easing, double start, double end, double applyFrom, double applyTo)
             : m_interpolation(interpolation)
             , m_easing(easing)
             , m_start(start)
             , m_end(end)
             , m_applyFrom(applyFrom)
             , m_applyTo(applyTo)
         {
         }
     };
 
+private:
+    InterpolationEffect()
+    {
+    }
+
     WillBeHeapVector<OwnPtrWillBeMember<InterpolationRecord> > m_interpolations;
 };
 
-}
+WILL_BE_EAGERLY_TRACED(InterpolationEffect);
+WILL_BE_EAGERLY_TRACED(InterpolationEffect::InterpolationRecord);
 
-#endif
+} // namespace blink
+
+#endif // InterpolationEffect_h