Introduce SVGGraphicsElement IDL interface

Source/core/rendering/svg/RenderSVGResourceClipper.cpp

Index: Source/core/rendering/svg/RenderSVGResourceClipper.cpp
diff --git a/Source/core/rendering/svg/RenderSVGResourceClipper.cpp b/Source/core/rendering/svg/RenderSVGResourceClipper.cpp
index f2c6834b61f6e54fa6c1274d8a67ee3908acbb7d..d9da9fb580562cb2f6a04d59431008afbf53afbd 100644
--- a/Source/core/rendering/svg/RenderSVGResourceClipper.cpp
+++ b/Source/core/rendering/svg/RenderSVGResourceClipper.cpp
@@ -100,9 +100,9 @@ bool RenderSVGResourceClipper::pathOnlyClipping(GraphicsContext* context, const
         // Only shapes or paths are supported for direct clipping. We need to fallback to masking for texts.
         if (renderer->isSVGText())
             return false;
-        if (!childNode->isSVGElement() || !toSVGElement(childNode)->isStyledTransformable())
+        if (!childNode->isSVGElement() || !toSVGElement(childNode)->isSVGGraphicsElement())
             continue;
-        SVGStyledTransformableElement* styled = toSVGStyledTransformableElement(childNode);
+        SVGGraphicsElement* styled = toSVGGraphicsElement(childNode);
         RenderStyle* style = renderer->style();
         if (!style || style->display() == NONE || style->visibility() != VISIBLE)
              continue;