Remove isSupportedAttribute in svg

Source/core/svg/SVGLineElement.cpp

Index: Source/core/svg/SVGLineElement.cpp
diff --git a/Source/core/svg/SVGLineElement.cpp b/Source/core/svg/SVGLineElement.cpp
index f774cd46c6f779ee9a71b10fbe89c1da3159f885..040203b264ae2702f3f273632711782b62b39d1b 100644
--- a/Source/core/svg/SVGLineElement.cpp
+++ b/Source/core/svg/SVGLineElement.cpp
@@ -50,46 +50,25 @@ DEFINE_TRACE(SVGLineElement)
 
 DEFINE_NODE_FACTORY(SVGLineElement)
 
-bool SVGLineElement::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        supportedAttributes.add(SVGNames::x1Attr);
-        supportedAttributes.add(SVGNames::x2Attr);
-        supportedAttributes.add(SVGNames::y1Attr);
-        supportedAttributes.add(SVGNames::y2Attr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 void SVGLineElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGGeometryElement::svgAttributeChanged(attrName);
-        return;
-    }
-
-    SVGElement::InvalidationGuard invalidationGuard(this);
-
-    bool isLengthAttribute = attrName == SVGNames::x1Attr
-                          || attrName == SVGNames::y1Attr
-                          || attrName == SVGNames::x2Attr
-                          || attrName == SVGNames::y2Attr;
-
-    if (isLengthAttribute)
+    if (attrName == SVGNames::x1Attr
+        || attrName == SVGNames::y1Attr
+        || attrName == SVGNames::x2Attr
+        || attrName == SVGNames::y2Attr) {
         updateRelativeLengthsInformation();
 
-    LayoutSVGShape* renderer = toLayoutSVGShape(this->layoutObject());
-    if (!renderer)
-        return;
+        LayoutSVGShape* renderer = toLayoutSVGShape(this->layoutObject());
+        if (!renderer)
+            return;
 
-    if (isLengthAttribute) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
         renderer->setNeedsShapeUpdate();
         markForLayoutAndParentResourceInvalidation(renderer);
         return;
     }
 
-    ASSERT_NOT_REACHED();
+    SVGGeometryElement::svgAttributeChanged(attrName);
 }
 
 bool SVGLineElement::selfHasRelativeLengths() const