DOMException toString is not correct

LayoutTests/svg/custom/script-tests/SVGException.js

 description("Tests the properties of the SVGException object.")
 
 var e;
 try {
     var svgDoc = document.implementation.createDocument("http://www.w3.org/2000/svg", "svg", null);
     var matrix = svgDoc.documentElement.createSVGMatrix();
     matrix.rotateFromVector(0, 0)
     // raises a SVG_INVALID_VALUE_ERR
 } catch (err) {
     e = err;
 }
 
-shouldBeEqualToString("e.toString()", "Error: SVG_INVALID_VALUE_ERR: DOM SVG Exception 1");
+shouldBeEqualToString("e.toString()", "SVG_INVALID_VALUE_ERR: An invalid value was passed to an operation or assigned to an attribute.");
 shouldBeEqualToString("Object.prototype.toString.call(e)", "[object SVGException]");
 shouldBeEqualToString("Object.prototype.toString.call(e.__proto__)", "[object SVGExceptionPrototype]");
 shouldBeEqualToString("e.constructor.toString()", "function SVGException() { [native code] }");
 shouldBe("e.constructor", "window.SVGException");
 shouldBe("e.SVG_WRONG_TYPE_ERR", "e.constructor.SVG_WRONG_TYPE_ERR");
 shouldBe("e.SVG_WRONG_TYPE_ERR", "0");
 shouldBe("e.SVG_INVALID_VALUE_ERR", "e.constructor.SVG_INVALID_VALUE_ERR");
 shouldBe("e.SVG_INVALID_VALUE_ERR", "1");
 shouldBe("e.SVG_MATRIX_NOT_INVERTABLE", "e.constructor.SVG_MATRIX_NOT_INVERTABLE");
 shouldBe("e.SVG_MATRIX_NOT_INVERTABLE", "2");
 
 var successfullyParsed = true;