Web Animations: Split image slice interpolation out of LengthBoxStyleInterpolation

Source/core/animation/LengthBoxStyleInterpolation.h

Index: Source/core/animation/LengthBoxStyleInterpolation.h
diff --git a/Source/core/animation/LengthBoxStyleInterpolation.h b/Source/core/animation/LengthBoxStyleInterpolation.h
index 3b45810f34acf2854f01659aeedcebcdcebc5fd3..71d073a814b9adc990ff24127954b8ba93a7e5f4 100644
--- a/Source/core/animation/LengthBoxStyleInterpolation.h
+++ b/Source/core/animation/LengthBoxStyleInterpolation.h
@@ -21,19 +21,15 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    LengthBoxStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> startInterpolation, PassOwnPtrWillBeRawPtr<InterpolableValue> endInterpolation, CSSPropertyID id, bool fill, CSSValue* startCSS, CSSValue* endCSS)
+    LengthBoxStyleInterpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> startInterpolation, PassOwnPtrWillBeRawPtr<InterpolableValue> endInterpolation, CSSPropertyID id, CSSValue* startCSS, CSSValue* endCSS)
         : StyleInterpolation(startInterpolation, endInterpolation, id)
-        , m_fill(fill)
         , m_startCSSValue(startCSS)
         , m_endCSSValue(endCSS)
     { }
 
     static PassOwnPtrWillBeRawPtr<InterpolableValue> lengthBoxtoInterpolableValue(const CSSValue&, const CSSValue&, bool);
-    static PassOwnPtrWillBeRawPtr<InterpolableValue> borderImageSlicetoInterpolableValue(const CSSValue&);
     static PassRefPtrWillBeRawPtr<CSSValue> interpolableValueToLengthBox(InterpolableValue*, const CSSValue&, const CSSValue&);
-    static PassRefPtrWillBeRawPtr<CSSValue> interpolableValueToBorderImageSlice(InterpolableValue*, bool);
 
-    bool m_fill;
     RefPtrWillBeMember<CSSValue> m_startCSSValue;
     RefPtrWillBeMember<CSSValue> m_endCSSValue;