[SVGDom] Add <circle>, <ellipse> support

experimental/svg/model/SkSVGEllipse.h

Index: experimental/svg/model/SkSVGEllipse.h
diff --git a/experimental/svg/model/SkSVGEllipse.h b/experimental/svg/model/SkSVGEllipse.h
new file mode 100644
index 0000000000000000000000000000000000000000..640d7f6f26a71a0379097453fbe700759abf23cf
--- /dev/null
+++ b/experimental/svg/model/SkSVGEllipse.h
@@ -0,0 +1,40 @@
+/*
+ * 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 SkSVGEllipse_DEFINED
+#define SkSVGEllipse_DEFINED
+
+#include "SkSVGShape.h"
+#include "SkSVGTypes.h"
+
+class SkSVGEllipse final : public SkSVGShape {
+public:
+    virtual ~SkSVGEllipse() = default;
+    static sk_sp<SkSVGEllipse> Make() { return sk_sp<SkSVGEllipse>(new SkSVGEllipse()); }
+
+    void setCx(const SkSVGLength&);
+    void setCy(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:
+    SkSVGEllipse();
+
+    SkSVGLength fCx = SkSVGLength(0);
+    SkSVGLength fCy = SkSVGLength(0);
+    SkSVGLength fRx = SkSVGLength(0);
+    SkSVGLength fRy = SkSVGLength(0);
+
+    typedef SkSVGShape INHERITED;
+};
+
+#endif // SkSVGEllipse_DEFINED