Add CSSInterpolationType specific ConversionChecker

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

Index: third_party/WebKit/Source/core/animation/CSSFontSizeInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSFontSizeInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSFontSizeInterpolationType.cpp
index a01a63a7b524c4029715ddb976b24bb0f37ff9ee..724e008fa1a293080895bfe022990f5e7bde1f6b 100644
--- a/third_party/WebKit/Source/core/animation/CSSFontSizeInterpolationType.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSFontSizeInterpolationType.cpp
@@ -16,7 +16,7 @@ namespace blink {
 
 namespace {
 
-class IsMonospaceChecker : public InterpolationType::ConversionChecker {
+class IsMonospaceChecker : public CSSInterpolationType::CSSConversionChecker {
  public:
   static std::unique_ptr<IsMonospaceChecker> Create(bool is_monospace) {
     return WTF::WrapUnique(new IsMonospaceChecker(is_monospace));
@@ -25,16 +25,16 @@ class IsMonospaceChecker : public InterpolationType::ConversionChecker {
  private:
   IsMonospaceChecker(bool is_monospace) : is_monospace_(is_monospace) {}
 
-  bool IsValid(const InterpolationEnvironment& environment,
+  bool IsValid(const StyleResolverState& state,
                const InterpolationValue&) const final {
-    return is_monospace_ ==
-           environment.GetState().Style()->GetFontDescription().IsMonospace();
+    return is_monospace_ == state.Style()->GetFontDescription().IsMonospace();
   }
 
   const bool is_monospace_;
 };
 
-class InheritedFontSizeChecker : public InterpolationType::ConversionChecker {
+class InheritedFontSizeChecker
+    : public CSSInterpolationType::CSSConversionChecker {
  public:
   static std::unique_ptr<InheritedFontSizeChecker> Create(
       const FontDescription::Size& inherited_font_size) {
@@ -45,10 +45,10 @@ class InheritedFontSizeChecker : public InterpolationType::ConversionChecker {
   InheritedFontSizeChecker(const FontDescription::Size& inherited_font_size)
       : inherited_font_size_(inherited_font_size.value) {}
 
-  bool IsValid(const InterpolationEnvironment& environment,
+  bool IsValid(const StyleResolverState& state,
                const InterpolationValue&) const final {
     return inherited_font_size_ ==
-           environment.GetState().ParentFontDescription().GetSize().value;
+           state.ParentFontDescription().GetSize().value;
   }
 
   const float inherited_font_size_;