Remove support for the externalResourcesRequired attribute.

Source/core/svg/SVGEllipseElement.cpp

Index: Source/core/svg/SVGEllipseElement.cpp
diff --git a/Source/core/svg/SVGEllipseElement.cpp b/Source/core/svg/SVGEllipseElement.cpp
index 8002b06dd94e1d4095260a739f8a6fa070da60de..2815e1048b58386cda650f26f3dc64efd31e62ba 100644
--- a/Source/core/svg/SVGEllipseElement.cpp
+++ b/Source/core/svg/SVGEllipseElement.cpp
@@ -35,14 +35,12 @@ DEFINE_ANIMATED_LENGTH(SVGEllipseElement, SVGNames::cxAttr, Cx, cx)
 DEFINE_ANIMATED_LENGTH(SVGEllipseElement, SVGNames::cyAttr, Cy, cy)
 DEFINE_ANIMATED_LENGTH(SVGEllipseElement, SVGNames::rxAttr, Rx, rx)
 DEFINE_ANIMATED_LENGTH(SVGEllipseElement, SVGNames::ryAttr, Ry, ry)
-DEFINE_ANIMATED_BOOLEAN(SVGEllipseElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
 
 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGEllipseElement)
     REGISTER_LOCAL_ANIMATED_PROPERTY(cx)
     REGISTER_LOCAL_ANIMATED_PROPERTY(cy)
     REGISTER_LOCAL_ANIMATED_PROPERTY(rx)
     REGISTER_LOCAL_ANIMATED_PROPERTY(ry)
-    REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
 END_REGISTER_ANIMATED_PROPERTIES
 
@@ -68,7 +66,6 @@ bool SVGEllipseElement::isSupportedAttribute(const QualifiedName& attrName)
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty()) {
         SVGLangSpace::addSupportedAttributes(supportedAttributes);
-        SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::cxAttr);
         supportedAttributes.add(SVGNames::cyAttr);
         supportedAttributes.add(SVGNames::rxAttr);
@@ -91,8 +88,7 @@ void SVGEllipseElement::parseAttribute(const QualifiedName& name, const AtomicSt
         setRxBaseValue(SVGLength::construct(LengthModeWidth, value, parseError, ForbidNegativeLengths));
     else if (name == SVGNames::ryAttr)
         setRyBaseValue(SVGLength::construct(LengthModeHeight, value, parseError, ForbidNegativeLengths));
-    else if (SVGLangSpace::parseAttribute(name, value)
-             || SVGExternalResourcesRequired::parseAttribute(name, value)) {
+    else if (SVGLangSpace::parseAttribute(name, value)) {
     } else
         ASSERT_NOT_REACHED();
 
@@ -126,7 +122,7 @@ void SVGEllipseElement::svgAttributeChanged(const QualifiedName& attrName)
         return;
     }
 
-    if (SVGLangSpace::isKnownAttribute(attrName) || SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
+    if (SVGLangSpace::isKnownAttribute(attrName)) {
         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
         return;
     }