SVGViewSpec wrapper should keep its context SVGSVGElement wrapper alive.

LayoutTests/svg/dom/SVGViewSpec-invalid-ref-crash.html

Index: LayoutTests/svg/dom/SVGViewSpec-invalid-ref-crash.html
diff --git a/LayoutTests/svg/dom/SVGViewSpec-invalid-ref-crash.html b/LayoutTests/svg/dom/SVGViewSpec-invalid-ref-crash.html
index f97b4b1818e2bb86483e95161d2f4bbee1f1a53c..890fee1b84376eaf05736f188bffec0f68720ccb 100644
--- a/LayoutTests/svg/dom/SVGViewSpec-invalid-ref-crash.html
+++ b/LayoutTests/svg/dom/SVGViewSpec-invalid-ref-crash.html
@@ -19,13 +19,13 @@
     document.getElementById("container").removeChild(document.getElementById("container").childNodes[0]);
 
     asyncGC(function() {
-        shouldBeNull("viewPreserveAspectRatio = svgView.preserveAspectRatio;");
-        shouldBeNull("viewTransform = svgView.transform;");
-        shouldBeNull("viewViewTarget = svgView.viewTarget;");
-        shouldNotThrow("viewViewBox = svgView.viewBox;");
-        shouldBeEqualToString("svgView.preserveAspectRatioString", "");
+        shouldBeNonNull("svgView.preserveAspectRatio;");
+        shouldBeNonNull("svgView.transform;");
+        shouldBeNull("svgView.viewTarget;");
+        shouldNotThrow("svgView.viewBox;");
+        shouldBeEqualToString("svgView.preserveAspectRatioString", "xMidYMid meet");
         shouldBeEqualToString("svgView.transformString", "");
-        shouldBeEqualToString("svgView.viewBoxString", "");
+        shouldBeEqualToString("svgView.viewBoxString", "0 0 0 0");
         finishJSTest();
     });