Convert SVG <text> and descendants to use RenderObject::isChildAllowed

Source/core/svg/SVGTSpanElement.cpp

Index: Source/core/svg/SVGTSpanElement.cpp
diff --git a/Source/core/svg/SVGTSpanElement.cpp b/Source/core/svg/SVGTSpanElement.cpp
index 77f13fcb23f3ec1aa3d538b84646333097a20b3d..9aa1a9390f4a80bca5b0d844255062ef81390583 100644
--- a/Source/core/svg/SVGTSpanElement.cpp
+++ b/Source/core/svg/SVGTSpanElement.cpp
@@ -43,19 +43,6 @@ RenderObject* SVGTSpanElement::createRenderer(RenderStyle*)
     return new RenderSVGTSpan(this);
 }
 
-bool SVGTSpanElement::childShouldCreateRenderer(const Node& child) const
-{
-    if (child.isTextNode()
-        || child.hasTagName(SVGNames::aTag)
-#if ENABLE(SVG_FONTS)
-        || child.hasTagName(SVGNames::altGlyphTag)
-#endif
-        || child.hasTagName(SVGNames::tspanTag))
-        return true;
-
-    return false;
-}
-
 bool SVGTSpanElement::rendererIsNeeded(const RenderStyle& style)
 {
     if (parentNode()