Revert "Roll IDL to multivm@567"

third_party/WebCore/svg/SVGViewSpec.idl

Index: third_party/WebCore/svg/SVGViewSpec.idl
diff --git a/third_party/WebCore/svg/SVGViewSpec.idl b/third_party/WebCore/svg/SVGViewSpec.idl
index ec545d14bdd5e641ddc8775069abb504f1d95376..e4ba46b2372f41d8454e5ce47b072f614215aa66 100644
--- a/third_party/WebCore/svg/SVGViewSpec.idl
+++ b/third_party/WebCore/svg/SVGViewSpec.idl
@@ -25,26 +25,16 @@
 
 module svg {
 
-    // SVGViewSpec intentionally doesn't inherit from SVGZoomAndPan & SVGFitToViewBox on the IDLs.
-    // It would require that any of those classes would be RefCounted, and we want to avoid that.
     interface [
-        Conditional=SVG,
-        JSGenerateToJSObject
-    ] SVGViewSpec {
+        Conditional=SVG
+    ] SVGViewSpec : SVGZoomAndPan, SVGFitToViewBox
+    {
           readonly attribute SVGTransformList transform;
-          readonly attribute SVGElement viewTarget;
-          readonly attribute DOMString viewBoxString;
-          readonly attribute DOMString preserveAspectRatioString;
-          readonly attribute DOMString transformString;
-          readonly attribute DOMString viewTargetString;
-
-          // SVGZoomAndPan
-          attribute unsigned short zoomAndPan
-              setter raises(DOMException);
-
-          // SVGFitToViewBox
-          readonly attribute SVGAnimatedRect viewBox;
-          readonly attribute SVGAnimatedPreserveAspectRatio preserveAspectRatio;
+          readonly attribute SVGElement       viewTarget;
+          readonly attribute DOMString        viewBoxString;
+          readonly attribute DOMString        preserveAspectRatioString;
+          readonly attribute DOMString        transformString;
+          readonly attribute DOMString        viewTargetString;
     };
 
 }