Initial SVG model

experimental/svg/model/SkSVGDOM.h

Index: experimental/svg/model/SkSVGDOM.h
diff --git a/experimental/svg/model/SkSVGDOM.h b/experimental/svg/model/SkSVGDOM.h
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+/*
+ * 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 SkSVGDOM_DEFINED
+#define SkSVGDOM_DEFINED
+
+#include "SkRefCnt.h"
+#include "SkSize.h"
+#include "SkTemplates.h"
+
+class SkCanvas;
+class SkDOM;
+class SkStream;
+class SkSVGNode;
+
+class SkSVGDOM : public SkRefCnt {
+public:
+    SkSVGDOM(const SkSize& containerSize);
+    ~SkSVGDOM() = default;
+
+    static sk_sp<SkSVGDOM> MakeFromDOM(const SkDOM&, const SkSize& containerSize);
+    static sk_sp<SkSVGDOM> MakeFromStream(SkStream&, const SkSize& containerSize);
+
+    void setContainerSize(const SkSize&);
+
+    void render(SkCanvas*) const;
+
+private:
+    SkSize           fContainerSize;
+    sk_sp<SkSVGNode> fRoot;
+
+    typedef SkRefCnt INHERITED;
+};
+
+#endif // SkSVGDOM_DEFINED