Move SVGTests attributes parsing to SVGGraphicsElement

Source/core/svg/SVGGraphicsElement.cpp

Index: Source/core/svg/SVGGraphicsElement.cpp
diff --git a/Source/core/svg/SVGGraphicsElement.cpp b/Source/core/svg/SVGGraphicsElement.cpp
index 9838822837530c3895f45e71e6ff4aef52e4bc67..2dfd3de561b4fcd85e0f32ffef5125fd29ad5b16 100644
--- a/Source/core/svg/SVGGraphicsElement.cpp
+++ b/Source/core/svg/SVGGraphicsElement.cpp
@@ -93,8 +93,10 @@ AffineTransform* SVGGraphicsElement::supplementalTransform()
 bool SVGGraphicsElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty())
+    if (supportedAttributes.isEmpty()) {
+        SVGTests::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::transformAttr);
+    }
     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
 }
 
@@ -111,6 +113,8 @@ void SVGGraphicsElement::parseAttribute(const QualifiedName& name, const AtomicS
         detachAnimatedTransformListWrappers(newList.size());
         setTransformBaseValue(newList);
         return;
+    } else if (SVGTests::parseAttribute(name, value)) {
+        return;
     }
 
     ASSERT_NOT_REACHED();
@@ -125,6 +129,9 @@ void SVGGraphicsElement::svgAttributeChanged(const QualifiedName& attrName)
 
     SVGElementInstance::InvalidationGuard invalidationGuard(this);
 
+    if (SVGTests::handleAttributeChange(this, attrName))
+        return;
+
     RenderObject* object = renderer();
     if (!object)
         return;