[GeometryInterface] add fromRect 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 d13c4c0994cf8fc44fc828b1dc940c1c00ad4a36..19ef067a599ba82c477c6c09df1f5c07e4fdb9e2 100644
--- a/third_party/WebKit/Source/core/dom/DOMQuad.h
+++ b/third_party/WebKit/Source/core/dom/DOMQuad.h
@@ -13,6 +13,7 @@ namespace blink {
 
 class DOMPoint;
 class DOMPointInit;
+class DOMRectInit;
 
 class CORE_EXPORT DOMQuad : public GarbageCollected<DOMQuad>,
                             public ScriptWrappable {
@@ -23,6 +24,7 @@ class CORE_EXPORT DOMQuad : public GarbageCollected<DOMQuad>,
                          const DOMPointInit& p2,
                          const DOMPointInit& p3,
                          const DOMPointInit& p4);
+  static DOMQuad* fromRect(const DOMRectInit&);
 
   DOMPoint* p1() const { return m_p1; }
   DOMPoint* p2() const { return m_p2; }
@@ -43,6 +45,7 @@ class CORE_EXPORT DOMQuad : public GarbageCollected<DOMQuad>,
           const DOMPointInit& p2,
           const DOMPointInit& p3,
           const DOMPointInit& p4);
+  DOMQuad(double x, double y, double width, double height);
 
   Member<DOMPoint> m_p1;
   Member<DOMPoint> m_p2;