Remove isSupportedAttribute in svg

Source/core/svg/SVGPathElement.cpp

Index: Source/core/svg/SVGPathElement.cpp
diff --git a/Source/core/svg/SVGPathElement.cpp b/Source/core/svg/SVGPathElement.cpp
index 052a153e1d1ff58c513a15f0320438048dea68be..92ec8b5073117607b1cc04ac59a04e1a0b5ce55a 100644
--- a/Source/core/svg/SVGPathElement.cpp
+++ b/Source/core/svg/SVGPathElement.cpp
@@ -200,36 +200,27 @@ PassRefPtrWillBeRawPtr<SVGPathSegCurvetoQuadraticSmoothRel> SVGPathElement::crea
     return SVGPathSegCurvetoQuadraticSmoothRel::create(0, x, y);
 }
 
-bool SVGPathElement::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        supportedAttributes.add(SVGNames::dAttr);
-        supportedAttributes.add(SVGNames::pathLengthAttr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 void SVGPathElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGGeometryElement::svgAttributeChanged(attrName);
-        return;
-    }
+    if (attrName == SVGNames::dAttr || attrName == SVGNames::pathLengthAttr) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
 
-    SVGElement::InvalidationGuard invalidationGuard(this);
+        LayoutSVGShape* renderer = toLayoutSVGShape(this->layoutObject());
 
-    LayoutSVGShape* renderer = toLayoutSVGShape(this->layoutObject());
+        if (attrName == SVGNames::dAttr) {
+            if (renderer)
+                renderer->setNeedsShapeUpdate();
+
+            invalidateMPathDependencies();
+        }
 
-    if (attrName == SVGNames::dAttr) {
         if (renderer)
-            renderer->setNeedsShapeUpdate();
+            markForLayoutAndParentResourceInvalidation(renderer);
 
-        invalidateMPathDependencies();
+        return;
     }
 
-    if (renderer)
-        markForLayoutAndParentResourceInvalidation(renderer);
+    SVGGeometryElement::svgAttributeChanged(attrName);
 }
 
 void SVGPathElement::invalidateMPathDependencies()