Add CSSInterpolationType specific ConversionChecker

third_party/WebKit/Source/core/animation/CSSScaleInterpolationType.cpp

Index: third_party/WebKit/Source/core/animation/CSSScaleInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSScaleInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSScaleInterpolationType.cpp
index 4635b49cb99cc3375b1c247ad78af5c55dbd6bd4..a6f18637511694a84cda578c94791ef1dc306cce 100644
--- a/third_party/WebKit/Source/core/animation/CSSScaleInterpolationType.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSScaleInterpolationType.cpp
@@ -62,7 +62,8 @@ std::unique_ptr<InterpolableValue> CreateScaleIdentity() {
   return std::move(list);
 }
 
-class InheritedScaleChecker : public InterpolationType::ConversionChecker {
+class InheritedScaleChecker
+    : public CSSInterpolationType::CSSConversionChecker {
  public:
   static std::unique_ptr<InheritedScaleChecker> Create(const Scale& scale) {
     return WTF::WrapUnique(new InheritedScaleChecker(scale));
@@ -71,9 +72,9 @@ class InheritedScaleChecker : public InterpolationType::ConversionChecker {
  private:
   InheritedScaleChecker(const Scale& scale) : scale_(scale) {}
 
-  bool IsValid(const InterpolationEnvironment& environment,
+  bool IsValid(const StyleResolverState& state,
                const InterpolationValue&) const final {
-    return scale_ == Scale(environment.GetState().ParentStyle()->Scale());
+    return scale_ == Scale(state.ParentStyle()->Scale());
   }
 
   const Scale scale_;