[SVGDom/experimental] Initial SVGLength support

experimental/svg/model/SkSVGNode.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 SkSVGNode_DEFINED
 #define SkSVGNode_DEFINED
 
 #include "SkRefCnt.h"
 #include "SkSVGAttribute.h"
 
 class SkCanvas;
 class SkMatrix;
 class SkSVGRenderContext;
 class SkSVGValue;
 
 enum class SkSVGTag {
     kG,
     kPath,
+    kRect,
     kSvg
 };
 
 class SkSVGNode : public SkRefCnt {
 public:
     virtual ~SkSVGNode();
 
     SkSVGTag tag() const { return fTag; }
 
     virtual void appendChild(sk_sp<SkSVGNode>) = 0;
 
-    void render(SkCanvas*) const;
     void render(SkCanvas*, const SkSVGRenderContext&) const;
 
     void setAttribute(SkSVGAttribute, const SkSVGValue&);
 
 protected:
     SkSVGNode(SkSVGTag);
 
     virtual void onRender(SkCanvas*, const SkSVGRenderContext&) const = 0;
 
     virtual void onSetAttribute(SkSVGAttribute, const SkSVGValue&);
 
     virtual const SkMatrix& onLocalMatrix() const;
 
 private:
     SkSVGTag                    fTag;
 
     // FIXME: this should be sparse
     SkSVGPresentationAttributes fPresentationAttributes;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif // SkSVGNode_DEFINED