LibWeb: Move SVGPathElement methods into SVGGeometryElement

From the spec:

> Interface SVGGeometryElement represents SVG elements whose rendering
> is defined by geometry with an equivalent path, and which can be
> filled and stroked. This includes paths and the basic shapes.

- https://svgwg.org/svg2-draft/types.html#InterfaceSVGGeometryElement

Making them all create an SVGPathBox, and return a Path from get_path(),
means we can implement the "basic shapes" using the path system we
already have. :^)

Userland/Libraries/LibWeb/SVG/SVGGeometryElement.cpp

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibWeb/Layout/SVGPathBox.h>
 #include <LibWeb/SVG/SVGGeometryElement.h>
 
 namespace Web::SVG {
@@ -13,4 +14,9 @@ SVGGeometryElement::SVGGeometryElement(DOM::Document& document, QualifiedName qu
 {
 }
 
+RefPtr<Layout::Node> SVGGeometryElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)
+{
+    return adopt_ref(*new Layout::SVGPathBox(document(), *this, move(style)));
+}
+
 }

Userland/Libraries/LibWeb/SVG/SVGGeometryElement.h

@@ -10,10 +10,15 @@
 
 namespace Web::SVG {
 
+// https://svgwg.org/svg2-draft/types.html#InterfaceSVGGeometryElement
 class SVGGeometryElement : public SVGGraphicsElement {
 public:
     using WrapperType = Bindings::SVGGeometryElementWrapper;
 
+    virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
+
+    virtual Gfx::Path& get_path() = 0;
+
 protected:
     SVGGeometryElement(DOM::Document& document, QualifiedName qualified_name);
 };

Userland/Libraries/LibWeb/SVG/SVGPathElement.cpp

@@ -443,11 +443,6 @@ SVGPathElement::SVGPathElement(DOM::Document& document, QualifiedName qualified_
 {
 }
 
-RefPtr<Layout::Node> SVGPathElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)
-{
-    return adopt_ref(*new Layout::SVGPathBox(document(), *this, move(style)));
-}
-
 void SVGPathElement::parse_attribute(const FlyString& name, const String& value)
 {
     SVGGeometryElement::parse_attribute(name, value);

Userland/Libraries/LibWeb/SVG/SVGPathElement.h

@@ -89,11 +89,9 @@ public:
     SVGPathElement(DOM::Document&, QualifiedName);
     virtual ~SVGPathElement() override = default;
 
-    virtual RefPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
-
     virtual void parse_attribute(const FlyString& name, const String& value) override;
 
-    Gfx::Path& get_path();
+    virtual Gfx::Path& get_path() override;
 
 private:
     Vector<PathInstruction> m_instructions;