Updated SVGListPropertyHelper as per SVG2 Spec

Source/core/svg/SVGTransformList.h

Index: Source/core/svg/SVGTransformList.h
diff --git a/Source/core/svg/SVGTransformList.h b/Source/core/svg/SVGTransformList.h
index 0c781ae28160c458bccfaa7d35e1888cbaad260f..a44484b3c21e48edb582e5ff57f1092038fbcd32 100644
--- a/Source/core/svg/SVGTransformList.h
+++ b/Source/core/svg/SVGTransformList.h
@@ -42,6 +42,8 @@ class SVGTransformListTearOff;
 class SVGTransformList final : public SVGListPropertyHelper<SVGTransformList, SVGTransform> {
 public:
     typedef SVGTransformListTearOff TearOffType;
+    typedef SVGTransform ItemPropertyType;
+    typedef SVGListPropertyHelper<SVGTransformList, SVGTransform> Base;
 
     static PassRefPtrWillBeRawPtr<SVGTransformList> create()
     {
@@ -67,6 +69,11 @@ public:
     virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtrWillBeRawPtr<SVGPropertyBase> fromValue, PassRefPtrWillBeRawPtr<SVGPropertyBase> toValue, PassRefPtrWillBeRawPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement*) override;
     virtual float calculateDistance(PassRefPtrWillBeRawPtr<SVGPropertyBase> to, SVGElement*) override;
 
+    PassRefPtrWillBeRawPtr<ItemPropertyType> initialize(PassRefPtrWillBeRawPtr<ItemPropertyType>);
+    PassRefPtrWillBeRawPtr<ItemPropertyType> appendItem(PassRefPtrWillBeRawPtr<ItemPropertyType> passItem);
+    PassRefPtrWillBeRawPtr<ItemPropertyType> insertItemBefore(PassRefPtrWillBeRawPtr<ItemPropertyType>, size_t);
+    PassRefPtrWillBeRawPtr<ItemPropertyType> replaceItem(PassRefPtrWillBeRawPtr<ItemPropertyType>, size_t, ExceptionState&);
+
     static AnimatedPropertyType classType() { return AnimatedTransformList; }
 
 private: