Remove maybeConvertSingle override in CSSValueInterpolationType

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

Index: third_party/WebKit/Source/core/animation/CSSValueInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/CSSValueInterpolationType.cpp b/third_party/WebKit/Source/core/animation/CSSValueInterpolationType.cpp
index 9f15de81abc38c2bfc2fd385c4940cda650154fb..50acd0214ae1ef91cb33e91c86f52829a50c6d1e 100644
--- a/third_party/WebKit/Source/core/animation/CSSValueInterpolationType.cpp
+++ b/third_party/WebKit/Source/core/animation/CSSValueInterpolationType.cpp
@@ -6,6 +6,8 @@
 
 #include "core/animation/InterpolationEnvironment.h"
 #include "core/animation/StringKeyframe.h"
+#include "core/css/CSSInheritedValue.h"
+#include "core/css/CSSInitialValue.h"
 #include "core/css/resolver/StyleBuilder.h"
 
 namespace blink {
@@ -35,22 +37,30 @@ class CSSValueNonInterpolableValue : public NonInterpolableValue {
 DEFINE_NON_INTERPOLABLE_VALUE_TYPE(CSSValueNonInterpolableValue);
 DEFINE_NON_INTERPOLABLE_VALUE_TYPE_CASTS(CSSValueNonInterpolableValue);
 
-InterpolationValue CSSValueInterpolationType::maybeConvertSingle(
-    const PropertySpecificKeyframe& keyframe,
-    const InterpolationEnvironment&,
-    const InterpolationValue&,
-    ConversionCheckers&) const {
-  if (keyframe.isNeutral())
-    return nullptr;
-
-  return InterpolationValue(
-      InterpolableList::create(0),
-      CSSValueNonInterpolableValue::create(
-          toCSSPropertySpecificKeyframe(keyframe).value()));
+InterpolationValue CSSValueInterpolationType::maybeConvertInitial(
+    const StyleResolverState& state,
+    ConversionCheckers& conversionCheckers) const {
+  return maybeConvertValue(*CSSInitialValue::create(), state,
+                           conversionCheckers);
+}
+
+InterpolationValue CSSValueInterpolationType::maybeConvertInherit(
+    const StyleResolverState& state,
+    ConversionCheckers& conversionCheckers) const {
+  return maybeConvertValue(*CSSInheritedValue::create(), state,
+                           conversionCheckers);
+}
+
+InterpolationValue CSSValueInterpolationType::maybeConvertValue(
+    const CSSValue& value,
+    const StyleResolverState& state,
+    ConversionCheckers& conversionCheckers) const {
+  return InterpolationValue(InterpolableList::create(0),
+                            CSSValueNonInterpolableValue::create(&value));
 }
 
 void CSSValueInterpolationType::applyStandardPropertyValue(
-    const InterpolableValue&,
+    const InterpolableValue& interpolableValue,
     const NonInterpolableValue* nonInterpolableValue,
     StyleResolverState& state) const {
   StyleBuilder::applyProperty(