Support intriscDefaultProto for Error functions

test/webkit/fast/js/native-error-prototype.js

Index: test/webkit/fast/js/native-error-prototype.js
diff --git a/test/webkit/fast/js/native-error-prototype.js b/test/webkit/fast/js/native-error-prototype.js
index 588deafe8dd5a12a083bc64c818a24427a4eb8f4..2ce548788df539c67dd1f6c4e69c0587e5288ab9 100644
--- a/test/webkit/fast/js/native-error-prototype.js
+++ b/test/webkit/fast/js/native-error-prototype.js
@@ -25,8 +25,8 @@ description(
 'This is a test case for bugs <a href="https://bugs.webkit.org/show_bug.cgi?id=55346">55346</a>, <a href="https://bugs.webkit.org/show_bug.cgi?id=70889">70889</a>, and <a href="https://bugs.webkit.org/show_bug.cgi?id=75452">75452</a>.'
 );
 
-shouldBe("({}).toString.call(Error.prototype)", '"[object Error]"');
-shouldBe("({}).toString.call(RangeError.prototype)", '"[object Error]"');
+shouldBe("({}).toString.call(Error.prototype)", '"[object Object]"');
+shouldBe("({}).toString.call(RangeError.prototype)", '"[object Object]"');
 
 var err = new Error("message");
 err.name = "";