DOMException toString is not correct

LayoutTests/fast/dom/custom/document-register-basic.html

Index: LayoutTests/fast/dom/custom/document-register-basic.html
diff --git a/LayoutTests/fast/dom/custom/document-register-basic.html b/LayoutTests/fast/dom/custom/document-register-basic.html
index e2dddf711b5ea4a5d96dac72bfdd95092a256781..80b41245f69a67f5adfb77f7f1ca4b25f793e7e3 100644
--- a/LayoutTests/fast/dom/custom/document-register-basic.html
+++ b/LayoutTests/fast/dom/custom/document-register-basic.html
@@ -19,9 +19,9 @@ function createRegisterParamters()
 }
 
 // Invalid names
-shouldThrow("document.register('foo', createRegisterParamters())", "'Error: InvalidCharacterError: DOM Exception 5'");
-shouldThrow("document.register('xfoo', createRegisterParamters())", "'Error: InvalidCharacterError: DOM Exception 5'");
-shouldThrow("document.register('missing-glyph', createRegisterParamters())", "'Error: InvalidCharacterError: DOM Exception 5'");
+shouldThrow("document.register('foo', createRegisterParamters())", "'InvalidCharacterError: An invalid or illegal character was specified, such as in an XML name.'");
+shouldThrow("document.register('xfoo', createRegisterParamters())", "'InvalidCharacterError: An invalid or illegal character was specified, such as in an XML name.'");
+shouldThrow("document.register('missing-glyph', createRegisterParamters())", "'InvalidCharacterError: An invalid or illegal character was specified, such as in an XML name.'");
 
 var fooConstructor = document.register("x-foo", createRegisterParamters());
 shouldBe("typeof fooConstructor", "'function'");
@@ -29,15 +29,15 @@ shouldBe("fooConstructor.prototype.__proto__", "HTMLElement.prototype");
 shouldBeTrue("fooConstructor.prototype.thisIsPrototype");
 
 // Name conflicts
-shouldThrow("document.register('x-foo', createRegisterParamters())", "'Error: InvalidStateError: DOM Exception 11'");
-shouldThrow("document.register('X-FOO', createRegisterParamters())", "'Error: InvalidStateError: DOM Exception 11'");
+shouldThrow("document.register('x-foo', createRegisterParamters())", "'InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.'");
+shouldThrow("document.register('X-FOO', createRegisterParamters())", "'InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.'");
 
 // Bad prototype: constructor property exists
-shouldThrow("document.register('x-bad-a', { prototype: HTMLElement.prototype })", "'Error: InvalidStateError: DOM Exception 11'");
+shouldThrow("document.register('x-bad-a', { prototype: HTMLElement.prototype })", "'InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.'");
 // Bad prototype: missing __proto__
-shouldThrow("document.register('x-bad-b', { prototype: {} })", "'Error: InvalidStateError: DOM Exception 11'");
+shouldThrow("document.register('x-bad-b', { prototype: {} })", "'InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.'");
 // Bad prototype: wrong __proto__
-shouldThrow("document.register('x-bad-c', { prototype: Object.create(Document.prototype) })", "'Error: InvalidStateError: DOM Exception 11'");
+shouldThrow("document.register('x-bad-c', { prototype: Object.create(Document.prototype) })", "'InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable.'");
 // Call as function
 shouldThrow("fooConstructor()", "'TypeError: DOM object constructor cannot be called as a function.'")