Make Keyframe::PropertySpecificKeyframes RefCounted

third_party/WebKit/Source/core/animation/InvalidatableInterpolation.h

 // Copyright 2015 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 InvalidatableInterpolation_h
 #define InvalidatableInterpolation_h
 
 #include "core/animation/InterpolationType.h"
 #include "core/animation/PrimitiveInterpolation.h"
 #include "core/animation/PropertyInterpolationTypesMapping.h"
 #include "core/animation/StyleInterpolation.h"
 #include "core/animation/TypedInterpolationValue.h"
 
 namespace blink {
 
 // TODO(alancutter): This class will replace *StyleInterpolation and Interpolation.
 // For now it needs to distinguish itself during the refactor and temporarily has an ugly name.
 class CORE_EXPORT InvalidatableInterpolation : public Interpolation {
 public:
     static PassRefPtr<InvalidatableInterpolation> create(
         PropertyHandle property,
         const InterpolationTypes& interpolationTypes,
-        const PropertySpecificKeyframe& startKeyframe,
-        const PropertySpecificKeyframe& endKeyframe)
+        PassRefPtr<PropertySpecificKeyframe> startKeyframe,
+        PassRefPtr<PropertySpecificKeyframe> endKeyframe)
     {
         return adoptRef(new InvalidatableInterpolation(property, interpolationTypes, startKeyframe, endKeyframe));
     }
 
     PropertyHandle property() const final { return m_property; }
     virtual void interpolate(int iteration, double fraction);
     bool dependsOnUnderlyingValue() const;
     virtual void apply(InterpolationEnvironment&) const { ASSERT_NOT_REACHED(); }
     static void applyStack(const ActiveInterpolations&, InterpolationEnvironment&);
 
     virtual bool isInvalidatableInterpolation() const { return true; }
 
 private:
     InvalidatableInterpolation(
         PropertyHandle property,
         const InterpolationTypes& interpolationTypes,
-        const PropertySpecificKeyframe& startKeyframe,
-        const PropertySpecificKeyframe& endKeyframe)
+        PassRefPtr<PropertySpecificKeyframe> startKeyframe,
+        PassRefPtr<PropertySpecificKeyframe> endKeyframe)
         : Interpolation(nullptr, nullptr)
         , m_property(property)
         , m_interpolationTypes(interpolationTypes)
-        , m_startKeyframe(&startKeyframe)
-        , m_endKeyframe(&endKeyframe)
+        , m_startKeyframe(startKeyframe)
+        , m_endKeyframe(endKeyframe)
         , m_currentFraction(std::numeric_limits<double>::quiet_NaN())
         , m_isCached(false)
     { }
 
     using ConversionCheckers = InterpolationType::ConversionCheckers;
 
     PassOwnPtr<TypedInterpolationValue> maybeConvertUnderlyingValue(const InterpolationEnvironment&) const;
     const TypedInterpolationValue* ensureValidInterpolation(const InterpolationEnvironment&, const UnderlyingValueOwner&) const;
     void clearCache() const;
     bool isCacheValid(const InterpolationEnvironment&, const UnderlyingValueOwner&) const;
     bool isNeutralKeyframeActive() const;
     PassOwnPtr<PairwisePrimitiveInterpolation> maybeConvertPairwise(const InterpolationEnvironment&, const UnderlyingValueOwner&) const;
     PassOwnPtr<TypedInterpolationValue> convertSingleKeyframe(const PropertySpecificKeyframe&, const InterpolationEnvironment&, const UnderlyingValueOwner&) const;
     void addConversionCheckers(const InterpolationType&, ConversionCheckers&) const;
     void setFlagIfInheritUsed(InterpolationEnvironment&) const;
     double underlyingFraction() const;
 
     const PropertyHandle m_property;
     const InterpolationTypes& m_interpolationTypes;
-    const PropertySpecificKeyframe* m_startKeyframe;
-    const PropertySpecificKeyframe* m_endKeyframe;
+    RefPtr<PropertySpecificKeyframe> m_startKeyframe;
+    RefPtr<PropertySpecificKeyframe> m_endKeyframe;
     double m_currentFraction;
     mutable bool m_isCached;
     mutable OwnPtr<PrimitiveInterpolation> m_cachedPairConversion;
     mutable ConversionCheckers m_conversionCheckers;
     mutable OwnPtr<TypedInterpolationValue> m_cachedValue;
 };
 
 DEFINE_TYPE_CASTS(InvalidatableInterpolation, Interpolation, value, value->isInvalidatableInterpolation(), value.isInvalidatableInterpolation());
 
 } // namespace blink
 
 #endif // InvalidatableInterpolation_h