Oilpan: Move CSSTimingData back to off-heap

Source/core/animation/css/CSSTimingData.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 CSSTimingData_h
 #define CSSTimingData_h
 
 #include "platform/animation/TimingFunction.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 struct Timing;
 
-class CSSTimingData : public NoBaseWillBeGarbageCollectedFinalized<CSSTimingData> {
+class CSSTimingData {
 public:
     ~CSSTimingData() { }
 
-    void trace(Visitor*) { }
-
     const Vector<double>& delayList() const { return m_delayList; }
     const Vector<double>& durationList() const { return m_durationList; }
     const Vector<RefPtr<TimingFunction> >& timingFunctionList() const { return m_timingFunctionList; }
 
     Vector<double>& delayList() { return m_delayList; }
     Vector<double>& durationList() { return m_durationList; }
     Vector<RefPtr<TimingFunction> >& timingFunctionList() { return m_timingFunctionList; }
 
     static double initialDelay() { return 0; }
     static double initialDuration() { return 0; }
     static PassRefPtr<TimingFunction> initialTimingFunction() { return CubicBezierTimingFunction::preset(CubicBezierTimingFunction::Ease); }
 
     template <class T> static const T& getRepeated(const Vector<T>& v, size_t index) { return v[index % v.size()]; }
 
 protected:
     CSSTimingData();
     explicit CSSTimingData(const CSSTimingData&);
 
     Timing convertToTiming(size_t index) const;
 
 private:
     Vector<double> m_delayList;
     Vector<double> m_durationList;
     Vector<RefPtr<TimingFunction> > m_timingFunctionList;
 };
 
 } // namespace blink
 
 #endif // CSSTimingData_h