Implement DOMQuad of geometry interfaces.

Source/core/dom/DOMQuad.h

+// Copyright 2014 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 "core/dom/DOMPoint.h"
+#include "core/dom/DOMRect.h"
+
+namespace blink {
+
+typedef const Dictionary DOMPointInit;
+typedef const Dictionary DOMRectInit;
+
+class DOMQuad;
+
+class DOMQuadPoint : public DOMPoint {
+public:
+    static DOMQuadPoint* create(DOMPointInit&, Member<DOMQuad>);
+    static DOMQuadPoint* create(double x, double y, Member<DOMQuad>);
+
+    virtual void setX(double) OVERRIDE;
+    virtual void setY(double) OVERRIDE;
+
+    virtual void trace(Visitor*) OVERRIDE;
+
+private:
+    DOMQuadPoint(double x, double y, Member<DOMQuad>);
+
+    Member<DOMQuad> m_quad;
+};
+
+class DOMQuad : public GarbageCollected<DOMQuad> {
+public:
+    static DOMQuad* create(DOMRectInit& = DOMRectInit());
+    static DOMQuad* create(DOMPointInit&, DOMPointInit&,
+        DOMPointInit& = DOMPointInit(), DOMPointInit& = 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();
+
+    void trace(Visitor*);
+
+protected:
+    DOMQuad(double x, double y, double width, double height);
+    DOMQuad(DOMPointInit&, DOMPointInit&, DOMPointInit&, DOMPointInit&);
+
+    Member<DOMPoint> m_p1;
+    Member<DOMPoint> m_p2;
+    Member<DOMPoint> m_p3;
+    Member<DOMPoint> m_p4;
+    Member<DOMRect> m_bounds;
+};
+
+} // namespace blink
+
+#endif