Implement DOMQuad of geometry interfaces.

Source/core/dom/DOMPointReadOnly.h

Index: Source/core/dom/DOMPointReadOnly.h
diff --git a/Source/core/dom/DOMPointReadOnly.h b/Source/core/dom/DOMPointReadOnly.h
index 14111603635989c111327cd53fa0661e16f664e4..1b21d4d4609a2dede8480df6bebb446357243b14 100644
--- a/Source/core/dom/DOMPointReadOnly.h
+++ b/Source/core/dom/DOMPointReadOnly.h
@@ -10,7 +10,7 @@
 
 namespace blink {
 
-class DOMPointReadOnly : public GarbageCollected<DOMPointReadOnly>, public ScriptWrappableBase {
+class DOMPointReadOnly : public GarbageCollectedFinalized<DOMPointReadOnly>, public ScriptWrappableBase {
 public:
     static DOMPointReadOnly* create(double x, double y, double z, double w);
 
@@ -19,7 +19,9 @@ public:
     double z() const { return m_z; }
     double w() const { return m_w; }
 
-    void trace(Visitor*) { }
+    virtual void trace(Visitor*) { }
+
+    virtual ~DOMPointReadOnly() { }
 
 protected:
     DOMPointReadOnly(double x, double y, double z, double w);