Store PropertyRegistry::Registrations on CSSInterpolationTypes for registered custom properties

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

Index: third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.h
diff --git a/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.h b/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.h
index 88561ce1fa6205d0b192050650d9b068c1150004..7a90cbdfe1defa1c47614f637926389243de3e28 100644
--- a/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.h
+++ b/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.h
@@ -5,13 +5,17 @@
 #ifndef CSSInterpolationTypesMap_h
 #define CSSInterpolationTypesMap_h
 
+#include "core/animation/CSSInterpolationType.h"
 #include "core/animation/InterpolationTypesMap.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+class CSSSyntaxDescriptor;
 class PropertyRegistry;
 
+using CSSInterpolationTypes = Vector<std::unique_ptr<CSSInterpolationType>>;
+
 class CSSInterpolationTypesMap : public InterpolationTypesMap {
  public:
   CSSInterpolationTypesMap(const PropertyRegistry* registry)
@@ -20,6 +24,10 @@ class CSSInterpolationTypesMap : public InterpolationTypesMap {
   const InterpolationTypes& get(const PropertyHandle&) const final;
   size_t version() const final;
 
+  static CSSInterpolationTypes createCSSInterpolationTypesForSyntax(
+      const AtomicString& propertyName,
+      const CSSSyntaxDescriptor&);
+
  private:
   Member<const PropertyRegistry> m_registry;
 };