Replace open-coded toSVG<type> with DEFINE_SVG_PROPERTY_TYPE_CASTS

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

Index: third_party/WebKit/Source/core/animation/LengthSVGInterpolation.cpp
diff --git a/third_party/WebKit/Source/core/animation/LengthSVGInterpolation.cpp b/third_party/WebKit/Source/core/animation/LengthSVGInterpolation.cpp
index f5d6bd6038fd0b18ac7631f01037711acf99244e..f051dfa07ed8cee6e33c0767a73ed6fe99057330 100644
--- a/third_party/WebKit/Source/core/animation/LengthSVGInterpolation.cpp
+++ b/third_party/WebKit/Source/core/animation/LengthSVGInterpolation.cpp
@@ -24,8 +24,8 @@ PassRefPtrWillBeRawPtr<SVGLengthList> LengthSVGInterpolation::createList(const S
 PassRefPtr<LengthSVGInterpolation> LengthSVGInterpolation::create(SVGPropertyBase* start, SVGPropertyBase* end, PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> attribute)
 {
     NonInterpolableType modeData;
-    OwnPtr<InterpolableValue> startValue = toInterpolableValue(toSVGLength(start).get(), attribute.get(), &modeData);
-    OwnPtr<InterpolableValue> endValue = toInterpolableValue(toSVGLength(end).get(), attribute.get(), nullptr);
+    OwnPtr<InterpolableValue> startValue = toInterpolableValue(toSVGLength(start), attribute.get(), &modeData);
+    OwnPtr<InterpolableValue> endValue = toInterpolableValue(toSVGLength(end), attribute.get(), nullptr);
     return adoptRef(new LengthSVGInterpolation(startValue.release(), endValue.release(), attribute, modeData));
 }