Install ConstructNonConstructable as construct stub for non-constructables.

test/webkit/class-syntax-call.js

Index: test/webkit/class-syntax-call.js
diff --git a/test/webkit/class-syntax-call.js b/test/webkit/class-syntax-call.js
index 3cf82a889985b0d109e632328d6753dd6b83a10f..fa32a8cc9be2019f13404d2fb961747f62aecae6 100644
--- a/test/webkit/class-syntax-call.js
+++ b/test/webkit/class-syntax-call.js
@@ -29,12 +29,12 @@ class A { constructor() {} };
 class B extends A { constructor() { super() } };
 
 shouldNotThrow('new A');
-shouldThrow('A()', '"TypeError: Class constructors cannot be invoked without \'new\'"');
+shouldThrow('A()', '"TypeError: Class constructor A cannot be invoked without \'new\'"');
 shouldNotThrow('new B');
-shouldThrow('B()', '"TypeError: Class constructors cannot be invoked without \'new\'"');
+shouldThrow('B()', '"TypeError: Class constructor B cannot be invoked without \'new\'"');
 shouldNotThrow('new (class { constructor() {} })()');
-shouldThrow('(class { constructor() {} })()', '"TypeError: Class constructors cannot be invoked without \'new\'"');
-shouldThrow('new (class extends null { constructor() { super() } })()', '"TypeError: function () {} is not a constructor"');
-shouldThrow('(class extends null { constructor() { super() } })()', '"TypeError: Class constructors cannot be invoked without \'new\'"');
+shouldThrow('(class { constructor() {} })()', '"TypeError: Class constructor  cannot be invoked without \'new\'"');
+shouldThrow('new (class extends null { constructor() { super() } })()', '"TypeError: super is not a constructor"');
+shouldThrow('(class extends null { constructor() { super() } })()', '"TypeError: Class constructor  cannot be invoked without \'new\'"');
 
 var successfullyParsed = true;