WIP: Implement CSS transitions on top of InterpolationTypes instead of AnimatableValues

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

Index: third_party/WebKit/Source/core/animation/KeyframeEffectModel.h
diff --git a/third_party/WebKit/Source/core/animation/KeyframeEffectModel.h b/third_party/WebKit/Source/core/animation/KeyframeEffectModel.h
index 5b6c806b335a9ed0fd673aec973b20f00f85d6fa..e61519b906fb93bbe4c447f6659ac913d7633623 100644
--- a/third_party/WebKit/Source/core/animation/KeyframeEffectModel.h
+++ b/third_party/WebKit/Source/core/animation/KeyframeEffectModel.h
@@ -91,9 +91,6 @@ public:
         return *m_keyframeGroups;
     }
 
-    // EffectModel implementation.
-    bool sample(int iteration, double fraction, double iterationDuration, Vector<RefPtr<Interpolation>>&) const override;
-
     bool isKeyframeEffectModel() const override { return true; }
 
     virtual bool isAnimatableValueKeyframeEffectModel() const { return false; }
@@ -117,19 +114,16 @@ public:
         return m_keyframeGroups->contains(property);
     }
 
-    bool isTransformRelatedEffect() const override;
-
 protected:
     KeyframeEffectModelBase(PassRefPtr<TimingFunction> defaultKeyframeEasing)
-        : m_lastIteration(0)
-        , m_lastFraction(std::numeric_limits<double>::quiet_NaN())
-        , m_lastIterationDuration(0)
-        , m_defaultKeyframeEasing(defaultKeyframeEasing)
+        : m_defaultKeyframeEasing(defaultKeyframeEasing)
         , m_hasSyntheticKeyframes(false)
         , m_needsCompositorKeyframesSnapshot(true)
     {
     }
 
+    void sampleImpl(int iteration, double fraction, double iterationDuration, Vector<RefPtr<Interpolation>>&) const final;
+
     static KeyframeVector normalizedKeyframes(const KeyframeVector& keyframes);
 
     // Lazily computes the groups of property-specific keyframes.
@@ -142,9 +136,6 @@ protected:
     // property-specific lists.
     mutable std::unique_ptr<KeyframeGroupMap> m_keyframeGroups;
     mutable InterpolationEffect m_interpolationEffect;
-    mutable int m_lastIteration;
-    mutable double m_lastFraction;
-    mutable double m_lastIterationDuration;
     RefPtr<TimingFunction> m_defaultKeyframeEasing;
 
     mutable bool m_hasSyntheticKeyframes;