[SVG] SVGAnimatedTransform{,List} migration to new SVG property impl.

Source/core/svg/SVGLinearGradientElement.cpp

Index: Source/core/svg/SVGLinearGradientElement.cpp
diff --git a/Source/core/svg/SVGLinearGradientElement.cpp b/Source/core/svg/SVGLinearGradientElement.cpp
index 205f2324583c9ee6ca2f93ba9157371b05192ff5..e3485d1e0669cbbaa9660b04a4406d9071f8baa8 100644
--- a/Source/core/svg/SVGLinearGradientElement.cpp
+++ b/Source/core/svg/SVGLinearGradientElement.cpp
@@ -123,9 +123,9 @@ static void setGradientAttributes(SVGGradientElement* element, LinearGradientAtt
     if (!attributes.hasGradientUnits() && element->gradientUnitsSpecified())
         attributes.setGradientUnits(element->gradientUnitsCurrentValue());
 
-    if (!attributes.hasGradientTransform() && element->gradientTransformSpecified()) {
+    if (!attributes.hasGradientTransform() && element->gradientTransform()->isSpecified()) {
         AffineTransform transform;
-        element->gradientTransformCurrentValue().concatenate(transform);
+        element->gradientTransform()->currentValue()->concatenate(transform);
         attributes.setGradientTransform(transform);
     }