[GeometryInterface] add fromRect function in DOMQuad.

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

Index: third_party/WebKit/Source/core/dom/DOMQuad.cpp
diff --git a/third_party/WebKit/Source/core/dom/DOMQuad.cpp b/third_party/WebKit/Source/core/dom/DOMQuad.cpp
index e93bce2293dbe2b0997b063edb1a09dad994b112..1b87a2196f8f044c3a77f6ccbf8b4da5a1cf691a 100644
--- a/third_party/WebKit/Source/core/dom/DOMQuad.cpp
+++ b/third_party/WebKit/Source/core/dom/DOMQuad.cpp
@@ -6,6 +6,7 @@
 
 #include "bindings/core/v8/V8ObjectBuilder.h"
 #include "core/dom/DOMPoint.h"
+#include "core/dom/DOMRectInit.h"
 
 namespace blink {
 
@@ -16,6 +17,10 @@ DOMQuad* DOMQuad::create(const DOMPointInit& p1,
   return new DOMQuad(p1, p2, p3, p4);
 }
 
+DOMQuad* DOMQuad::fromRect(const DOMRectInit& other) {
+  return new DOMQuad(other.x(), other.y(), other.width(), other.height());
+}
+
 DOMQuad::DOMQuad(const DOMPointInit& p1,
                  const DOMPointInit& p2,
                  const DOMPointInit& p3,
@@ -25,6 +30,12 @@ DOMQuad::DOMQuad(const DOMPointInit& p1,
       m_p3(DOMPoint::fromPoint(p3)),
       m_p4(DOMPoint::fromPoint(p4)) {}
 
+DOMQuad::DOMQuad(double x, double y, double width, double height)
+    : m_p1(DOMPoint::create(x, y, 0, 1)),
+      m_p2(DOMPoint::create(x + width, y, 0, 1)),
+      m_p3(DOMPoint::create(x + width, y + height, 0, 1)),
+      m_p4(DOMPoint::create(x, y + height, 0, 1)) {}
+
 ScriptValue DOMQuad::toJSONForBinding(ScriptState* scriptState) const {
   V8ObjectBuilder result(scriptState);
   result.add("p1", p1());