Web Animations API: Deferred computation of interpolated values

Source/core/animation/Interpolation.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 Interpolation_h
 #define Interpolation_h
 
 #include "CSSPropertyNames.h"
 #include "core/animation/InterpolableValue.h"
 #include "platform/heap/Handle.h"
@@ skipping 54 matching lines @@
 protected:
     CSSPropertyID m_id;
 
     StyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
         : Interpolation(start, end)
         , m_id(id)
     {
     }
 };
 
-class LegacyStyleInterpolation : public StyleInterpolation {
-public:
-    static PassRefPtrWillBeRawPtr<LegacyStyleInterpolation> create(PassRefPtrWillBeRawPtr<AnimatableValue> start, PassRefPtrWillBeRawPtr<AnimatableValue> end, CSSPropertyID id)
-    {
-        return adoptRefWillBeNoop(new LegacyStyleInterpolation(InterpolableAnimatableValue::create(start), InterpolableAnimatableValue::create(end), id));
-    }
-
-    virtual void apply(StyleResolverState&) const OVERRIDE;
-
-    virtual bool isLegacyStyleInterpolation() const OVERRIDE FINAL { return true; }
-    PassRefPtrWillBeRawPtr<AnimatableValue> currentValue() const
-    {
-        InterpolableAnimatableValue* value = static_cast<InterpolableAnimatableValue*>(m_cachedValue.get());
-        return value->value();
-    }
-
-    virtual void trace(Visitor*) OVERRIDE;
-
-private:
-    LegacyStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end, CSSPropertyID id)
-        : StyleInterpolation(start, end, id)
-    {
-    }
-};
-
 class LengthStyleInterpolation : public StyleInterpolation {
 public:
     static PassRefPtrWillBeRawPtr<LengthStyleInterpolation> create(CSSValue* start, CSSValue* end, CSSPropertyID id)
     {
         return adoptRefWillBeNoop(new LengthStyleInterpolation(lengthToInterpolableValue(start), lengthToInterpolableValue(end), id));
     }
 
     static bool canCreateFrom(const CSSValue&);
 
     virtual void apply(StyleResolverState&) const OVERRIDE;
@@ skipping 26 matching lines @@
         , m_startCSSValue(start)
         , m_endCSSValue(end)
     {
     }
 
     RefPtrWillBeMember<CSSValue> m_startCSSValue;
     RefPtrWillBeMember<CSSValue> m_endCSSValue;
 };
 
 DEFINE_TYPE_CASTS(StyleInterpolation, Interpolation, value, value->isStyleInterpolation(), value.isStyleInterpolation());
-DEFINE_TYPE_CASTS(LegacyStyleInterpolation, Interpolation, value, value->isLegacyStyleInterpolation(), value.isLegacyStyleInterpolation());
 
 }
 
 #endif