Use Length for the stroke-dasharray property in SVGLayoutStyle

Source/core/animation/animatable/AnimatableValueTestHelper.cpp

Index: Source/core/animation/animatable/AnimatableValueTestHelper.cpp
diff --git a/Source/core/animation/animatable/AnimatableValueTestHelper.cpp b/Source/core/animation/animatable/AnimatableValueTestHelper.cpp
index 5b02a045c3d8f9f2e1bc9c0b7d0fe4492121ea12..a6972956deb2559ead0aa41bd3deb85c5d029fef 100644
--- a/Source/core/animation/animatable/AnimatableValueTestHelper.cpp
+++ b/Source/core/animation/animatable/AnimatableValueTestHelper.cpp
@@ -88,10 +88,14 @@ void PrintTo(const AnimatableShapeValue& animValue, ::std::ostream* os)
 void PrintTo(const AnimatableStrokeDasharrayList& animValue, ::std::ostream* os)
 {
     *os << "AnimatableStrokeDasharrayList(";
-    RefPtrWillBeRawPtr<SVGLengthList> list = animValue.toSVGLengthList();
-    size_t length = list->length();
+    RefPtr<SVGDashArray> list = animValue.toSVGDashArray(1);
+    size_t length = list->size();
     for (size_t i = 0; i < length; ++i) {
-        *os << list->at(i)->valueAsString().utf8().data();
+        const Length& dashLength = list->at(i);
+        PixelsAndPercent pixelsAndPercent = dashLength.pixelsAndPercent();
+        *os << pixelsAndPercent.pixels << '+';
+        *os << pixelsAndPercent.percent << '%';
+
         if (i != length-1)
             *os << ", ";
     }