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

experimental/svg/model/SkSVGRect.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkSVGRect_DEFINED
 #define SkSVGRect_DEFINED
 
 #include "SkSVGShape.h"
 #include "SkSVGTypes.h"
 
 class SkSVGRect final : public SkSVGShape {
 public:
     virtual ~SkSVGRect() = default;
     static sk_sp<SkSVGRect> Make() { return sk_sp<SkSVGRect>(new SkSVGRect()); }
 
     void setX(const SkSVGLength&);
     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;
 
     void onDraw(SkCanvas*, const SkSVGLengthContext&, const SkPaint&) const override;
 
 private:
     SkSVGRect();
 
     SkSVGLength fX      = SkSVGLength(0);
     SkSVGLength fY      = SkSVGLength(0);
     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;
 };
 
 #endif // SkSVGRect_DEFINED