Pass InterpolationEnvironment as a reference to InterpolationType conversion functions

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 e4df886a16be9454749bfb9bddf7e710e1eb8ef7..33ffb565438dbeb72cab274fde29ad78dc0bbfa5 100644
--- a/third_party/WebKit/Source/core/animation/CSSInterpolationType.h
+++ b/third_party/WebKit/Source/core/animation/CSSInterpolationType.h
@@ -20,23 +20,22 @@ protected:
 
     CSSPropertyID cssProperty() const { return property().cssProperty(); }
 
-    virtual PassOwnPtr<InterpolationValue> maybeConvertSingle(const PropertySpecificKeyframe& keyframe, const InterpolationEnvironment* environment, const UnderlyingValue& underlyingValue, ConversionCheckers& conversionCheckers) const
+    virtual PassOwnPtr<InterpolationValue> maybeConvertSingle(const PropertySpecificKeyframe& keyframe, const InterpolationEnvironment& environment, const UnderlyingValue& underlyingValue, ConversionCheckers& conversionCheckers) const
     {
         const CSSValue* value = toCSSPropertySpecificKeyframe(keyframe).value();
-        const StyleResolverState* state = environment ? &environment->state() : nullptr;
         if (!value)
             return maybeConvertNeutral(underlyingValue, conversionCheckers);
         if (value->isInitialValue() || (value->isUnsetValue() && !CSSPropertyMetadata::isInheritedProperty(cssProperty())))
             return maybeConvertInitial();
         if (value->isInheritedValue() || (value->isUnsetValue() && CSSPropertyMetadata::isInheritedProperty(cssProperty())))
-            return maybeConvertInherit(state, conversionCheckers);
-        return maybeConvertValue(*value, state, conversionCheckers);
+            return maybeConvertInherit(environment.state(), conversionCheckers);
+        return maybeConvertValue(*value, environment.state(), conversionCheckers);
     }
 
     virtual PassOwnPtr<InterpolationValue> maybeConvertNeutral(const UnderlyingValue&, ConversionCheckers&) const { ASSERT_NOT_REACHED(); return nullptr; }
     virtual PassOwnPtr<InterpolationValue> maybeConvertInitial() const { ASSERT_NOT_REACHED(); return nullptr; }
-    virtual PassOwnPtr<InterpolationValue> maybeConvertInherit(const StyleResolverState*, ConversionCheckers& conversionCheckers) const { ASSERT_NOT_REACHED(); return nullptr; }
-    virtual PassOwnPtr<InterpolationValue> maybeConvertValue(const CSSValue& value, const StyleResolverState*, ConversionCheckers& conversionCheckers) const { ASSERT_NOT_REACHED(); return nullptr; }
+    virtual PassOwnPtr<InterpolationValue> maybeConvertInherit(const StyleResolverState&, ConversionCheckers& conversionCheckers) const { ASSERT_NOT_REACHED(); return nullptr; }
+    virtual PassOwnPtr<InterpolationValue> maybeConvertValue(const CSSValue& value, const StyleResolverState&, ConversionCheckers& conversionCheckers) const { ASSERT_NOT_REACHED(); return nullptr; }
 };
 
 } // namespace blink