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

Source/core/svg/SVGFEGaussianBlurElement.h

Index: Source/core/svg/SVGFEGaussianBlurElement.h
diff --git a/Source/core/svg/SVGFEGaussianBlurElement.h b/Source/core/svg/SVGFEGaussianBlurElement.h
index a4e9f34295cbfabe7b97d5f05f7ef10b1307bb05..063a644442aabaf13657af15ebbfe6e9e3aa83a1 100644
--- a/Source/core/svg/SVGFEGaussianBlurElement.h
+++ b/Source/core/svg/SVGFEGaussianBlurElement.h
@@ -35,6 +35,7 @@ public:
 
     SVGAnimatedNumber* stdDeviationX() { return m_stdDeviation->firstNumber(); }
     SVGAnimatedNumber* stdDeviationY() { return m_stdDeviation->secondNumber(); }
+    SVGAnimatedString* in1() { return m_in1.get(); }
 
 private:
     explicit SVGFEGaussianBlurElement(Document&);
@@ -45,8 +46,8 @@ private:
     virtual PassRefPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) OVERRIDE;
 
     RefPtr<SVGAnimatedNumberOptionalNumber> m_stdDeviation;
+    RefPtr<SVGAnimatedString> m_in1;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGFEGaussianBlurElement)
-        DECLARE_ANIMATED_STRING(In1, in1)
     END_DECLARE_ANIMATED_PROPERTIES
 };