Store PropertyRegistry::Registrations on CSSInterpolationTypes for registered custom properties

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

Index: third_party/WebKit/Source/core/animation/CSSInterpolationType.h
diff --git a/third_party/WebKit/Source/core/animation/CSSInterpolationType.h b/third_party/WebKit/Source/core/animation/CSSInterpolationType.h
index 3628fd6fd6c5d4cf6e74f0d81256f186a4ed32c2..2c9b9ee29e45a719ab2abc1e291a20cf44ae0f3b 100644
--- a/third_party/WebKit/Source/core/animation/CSSInterpolationType.h
+++ b/third_party/WebKit/Source/core/animation/CSSInterpolationType.h
@@ -11,8 +11,12 @@
 namespace blink {
 
 class CSSCustomPropertyDeclaration;
+class PropertyRegistration;
 
 class CSSInterpolationType : public InterpolationType {
+ public:
+  void setCustomPropertyRegistration(const PropertyRegistration&);
+
  protected:
   CSSInterpolationType(PropertyHandle);
 
@@ -75,6 +79,8 @@ class CSSInterpolationType : public InterpolationType {
   void applyCustomPropertyValue(const InterpolableValue&,
                                 const NonInterpolableValue*,
                                 StyleResolverState&) const;
+
+  WeakPersistent<const PropertyRegistration> m_registration;
 };
 
 }  // namespace blink