Web Animations CSS: Support animation of stroke-dasharray property

Source/core/animation/css/CSSAnimatableValueFactory.cpp

Index: Source/core/animation/css/CSSAnimatableValueFactory.cpp
diff --git a/Source/core/animation/css/CSSAnimatableValueFactory.cpp b/Source/core/animation/css/CSSAnimatableValueFactory.cpp
index 83a8deb705e5eb0642741025bbd58227a22cbb40..ee7a02222ed4f02da4f770f078d65c3e8fcf2938 100644
--- a/Source/core/animation/css/CSSAnimatableValueFactory.cpp
+++ b/Source/core/animation/css/CSSAnimatableValueFactory.cpp
@@ -43,6 +43,7 @@
 #include "core/animation/AnimatableSVGLength.h"
 #include "core/animation/AnimatableSVGPaint.h"
 #include "core/animation/AnimatableShapeValue.h"
+#include "core/animation/AnimatableStrokeDasharrayList.h"
 #include "core/animation/AnimatableTransform.h"
 #include "core/animation/AnimatableUnknown.h"
 #include "core/animation/AnimatableVisibility.h"
@@ -281,6 +282,8 @@ PassRefPtr<AnimatableValue> CSSAnimatableValueFactory::create(CSSPropertyID prop
         return createFromColor(property, style);
     case CSSPropertyStopOpacity:
         return createFromDouble(style->stopOpacity());
+    case CSSPropertyStrokeDasharray:
+        return AnimatableStrokeDasharrayList::create(style->strokeDashArray());
     case CSSPropertyStrokeDashoffset:
         return AnimatableSVGLength::create(style->strokeDashOffset());
     case CSSPropertyStrokeMiterlimit: