Convert remaining RenderSVG* nodes to RenderObject::isChildAllowed

Source/core/rendering/svg/RenderSVGInline.cpp

Index: Source/core/rendering/svg/RenderSVGInline.cpp
diff --git a/Source/core/rendering/svg/RenderSVGInline.cpp b/Source/core/rendering/svg/RenderSVGInline.cpp
index a3045042311ca77758ce48b732d8e7b077fa8ada..64f6b4d66accd8193cc09e9e46557f9f35ff74c9 100644
--- a/Source/core/rendering/svg/RenderSVGInline.cpp
+++ b/Source/core/rendering/svg/RenderSVGInline.cpp
@@ -23,6 +23,7 @@
 
 #include "core/rendering/svg/RenderSVGInline.h"
 
+#include "SVGNames.h"
 #include "core/rendering/svg/RenderSVGText.h"
 #include "core/rendering/svg/SVGInlineFlowBox.h"
 #include "core/rendering/svg/SVGRenderSupport.h"
@@ -35,6 +36,12 @@ bool RenderSVGInline::isChildAllowed(RenderObject* child, RenderStyle* style) co
     if (child->isText())
         return SVGRenderSupport::isRenderableTextNode(child);
 
+    if (node()->hasTagName(SVGNames::aTag)) {
+        // Disallow direct descendant 'a'.
+        if (child->node()->hasTagName(SVGNames::aTag))
+            return false;
+    }
+
     if (!child->isSVGInline() && !child->isSVGInlineText())
         return false;