Add CSSInterpolationType specific ConversionChecker

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

Index: third_party/WebKit/Source/core/animation/CSSLengthInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSLengthInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSLengthInterpolationType.cpp
index 114c0d1a5f74a250aada9174c60b26520360ea95..eb48d47dbb26355f51f6f6b699abdd8f87c5fd7e 100644
--- a/third_party/WebKit/Source/core/animation/CSSLengthInterpolationType.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSLengthInterpolationType.cpp
@@ -28,7 +28,8 @@ float CSSLengthInterpolationType::EffectiveZoom(
              : 1;
 }
 
-class InheritedLengthChecker : public InterpolationType::ConversionChecker {
+class InheritedLengthChecker
+    : public CSSInterpolationType::CSSConversionChecker {
  public:
   static std::unique_ptr<InheritedLengthChecker> Create(CSSPropertyID property,
                                                         const Length& length) {
@@ -39,11 +40,11 @@ class InheritedLengthChecker : public InterpolationType::ConversionChecker {
   InheritedLengthChecker(CSSPropertyID property, const Length& length)
       : property_(property), length_(length) {}
 
-  bool IsValid(const InterpolationEnvironment& environment,
+  bool IsValid(const StyleResolverState& state,
                const InterpolationValue& underlying) const final {
     Length parent_length;
-    if (!LengthPropertyFunctions::GetLength(
-            property_, *environment.GetState().ParentStyle(), parent_length))
+    if (!LengthPropertyFunctions::GetLength(property_, *state.ParentStyle(),
+                                            parent_length))
       return false;
     return parent_length == length_;
   }