[GeometryInterface] add toJSON() function in DOMQuad

third_party/WebKit/Source/core/dom/DOMQuad.h

Index: third_party/WebKit/Source/core/dom/DOMQuad.h
diff --git a/third_party/WebKit/Source/core/dom/DOMQuad.h b/third_party/WebKit/Source/core/dom/DOMQuad.h
index 0b5aac6fdb93c5e0c27042949ac77ace0f9d0d75..d13c4c0994cf8fc44fc828b1dc940c1c00ad4a36 100644
--- a/third_party/WebKit/Source/core/dom/DOMQuad.h
+++ b/third_party/WebKit/Source/core/dom/DOMQuad.h
@@ -5,6 +5,7 @@
 #ifndef DOMQuad_h
 #define DOMQuad_h
 
+#include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 
@@ -28,6 +29,8 @@ class CORE_EXPORT DOMQuad : public GarbageCollected<DOMQuad>,
   DOMPoint* p3() const { return m_p3; }
   DOMPoint* p4() const { return m_p4; }
 
+  ScriptValue toJSONForBinding(ScriptState*) const;
+
   DEFINE_INLINE_TRACE() {
     visitor->trace(m_p1);
     visitor->trace(m_p2);