Implement DOMQuad of geometry interfaces.

Source/core/dom/DOMQuad.h

Index: Source/core/dom/DOMQuad.h
diff --git a/Source/core/dom/DOMQuad.h b/Source/core/dom/DOMQuad.h
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+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DOMQuad_h
+#define DOMQuad_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/DOMPoint.h"
+#include "core/dom/DOMRect.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class DOMRectInit;
+class DOMQuad;
+
+class DOMQuadPoint final : public DOMPoint {
+public:
+    static DOMQuadPoint* create(const DOMPointInit&, Member<DOMQuad>);
+    static DOMQuadPoint* create(double x, double y, Member<DOMQuad>);
+
+    virtual void setX(double) override;
+    virtual void setY(double) override;
+
+    DEFINE_INLINE_VIRTUAL_TRACE() { visitor->trace(m_quad); DOMPoint::trace(visitor); }
+
+private:
+    DOMQuadPoint(double x, double y, Member<DOMQuad>);
+
+    Member<DOMQuad> m_quad;
+};
+
+class DOMQuad final : public GarbageCollected<DOMQuad>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static DOMQuad* create(const DOMRectInit&);
+    static DOMQuad* create(const DOMPointInit&, const DOMPointInit&,
+        const DOMPointInit&, const DOMPointInit&);
+
+    DOMPoint* p1() const { return m_p1.get(); }
+    DOMPoint* p2() const { return m_p2.get(); }
+    DOMPoint* p3() const { return m_p3.get(); }
+    DOMPoint* p4() const { return m_p4.get(); }
+    DOMRectReadOnly* bounds();
+
+    void updateHorizontalBounds();
+    void updateVerticalBounds();
+
+    DEFINE_INLINE_TRACE()
+    {
+        visitor->trace(m_p1);
+        visitor->trace(m_p2);
+        visitor->trace(m_p3);
+        visitor->trace(m_p4);
+        visitor->trace(m_bounds);
+    }
+
+protected:
+    DOMQuad(const DOMRectInit&);
+    DOMQuad(const DOMPointInit&, const DOMPointInit&,
+        const DOMPointInit&, const DOMPointInit&);
+
+    Member<DOMPoint> m_p1;
+    Member<DOMPoint> m_p2;
+    Member<DOMPoint> m_p3;
+    Member<DOMPoint> m_p4;
+    Member<DOMRect> m_bounds;
+};
+
+} // namespace blink
+
+#endif