[SVGDom] Add rx/ry support for <rect>

experimental/svg/model/SkSVGRect.h

Index: experimental/svg/model/SkSVGRect.h
diff --git a/experimental/svg/model/SkSVGRect.h b/experimental/svg/model/SkSVGRect.h
index b4cd363d77ead81a48131ce963bf496435f862ae..0da248c4eb1fd2204c116fc82a9ab035989c0b10 100644
--- a/experimental/svg/model/SkSVGRect.h
+++ b/experimental/svg/model/SkSVGRect.h
@@ -20,6 +20,8 @@ public:
     void setY(const SkSVGLength&);
     void setWidth(const SkSVGLength&);
     void setHeight(const SkSVGLength&);
+    void setRx(const SkSVGLength&);
+    void setRy(const SkSVGLength&);
 
 protected:
     void onSetAttribute(SkSVGAttribute, const SkSVGValue&) override;
@@ -34,6 +36,11 @@ private:
     SkSVGLength fWidth  = SkSVGLength(0);
     SkSVGLength fHeight = SkSVGLength(0);
 
+    // The x radius for rounded rects.
+    SkSVGLength fRx     = SkSVGLength(0);
+    // The y radius for rounded rects.
+    SkSVGLength fRy     = SkSVGLength(0);
+
     typedef SkSVGShape INHERITED;
 };