Avoid duplicating the CSS property mapping for SVG pres. attrs.

third_party/WebKit/Source/core/svg/SVGAnimatedPath.cpp

Index: third_party/WebKit/Source/core/svg/SVGAnimatedPath.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGAnimatedPath.cpp b/third_party/WebKit/Source/core/svg/SVGAnimatedPath.cpp
index a2821543077d97a2e6da48456b7f32f87296db10..1dd30a6a858156a8a7950c890411ac6e3cd8c63d 100644
--- a/third_party/WebKit/Source/core/svg/SVGAnimatedPath.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGAnimatedPath.cpp
@@ -30,6 +30,8 @@
 
 #include "core/svg/SVGAnimatedPath.h"
 
+#include "core/css/CSSIdentifierValue.h"
+
 namespace blink {
 
 SVGAnimatedPath::SVGAnimatedPath(SVGElement* contextElement,
@@ -42,4 +44,11 @@ SVGAnimatedPath::SVGAnimatedPath(SVGElement* contextElement,
 
 SVGAnimatedPath::~SVGAnimatedPath() {}
 
+const CSSValue* SVGAnimatedPath::cssValue() const {
+  const CSSPathValue* pathValue = currentValue()->pathValue();
+  if (pathValue->stylePath()->byteStream().isEmpty())
+    return CSSIdentifierValue::create(CSSValueNone);
+  return pathValue;
+}
+
 }  // namespace blink