Oilpan: Move InterpolableValue's hierarchy to oilpan's heap

Source/core/animation/Interpolation.cpp

Index: Source/core/animation/Interpolation.cpp
diff --git a/Source/core/animation/Interpolation.cpp b/Source/core/animation/Interpolation.cpp
index 4ceda726ea4a40398126d44d1fcc976f9e6e8524..93b858d03c7ad70bf9365450f1d09e8302f1513d 100644
--- a/Source/core/animation/Interpolation.cpp
+++ b/Source/core/animation/Interpolation.cpp
@@ -35,7 +35,7 @@ bool typesMatch(const InterpolableValue* start, const InterpolableValue* end)
 
 }
 
-Interpolation::Interpolation(PassOwnPtr<InterpolableValue> start, PassOwnPtr<InterpolableValue> end)
+Interpolation::Interpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end)
     : m_start(start)
     , m_end(end)
     , m_cachedFraction(0)
@@ -54,6 +54,13 @@ void Interpolation::interpolate(int iteration, double fraction) const
     }
 }
 
+void Interpolation::trace(Visitor* visitor)
+{
+    visitor->trace(m_start);
+    visitor->trace(m_end);
+    visitor->trace(m_cachedValue);
+}
+
 void StyleInterpolation::trace(Visitor* visitor)
 {
     Interpolation::trace(visitor);