Simplify Custom Element constructors to be functions, not wrappers

Source/bindings/tests/idls/TestObject.idl

Index: Source/bindings/tests/idls/TestObject.idl
diff --git a/Source/bindings/tests/idls/TestObject.idl b/Source/bindings/tests/idls/TestObject.idl
index 9260497b585c6d04df6b044ad0075230106e239d..1b332249a3cb94a57ff2d2f4b3590ce391a0db00 100644
--- a/Source/bindings/tests/idls/TestObject.idl
+++ b/Source/bindings/tests/idls/TestObject.idl
@@ -32,6 +32,8 @@
 
 enum TestEnumType { "", "EnumValue1", "EnumValue2", "EnumValue3" };
 
+callback TestCallbackFunction = void (TestEnumType formal1, TestObject formal2);
+
 [
     Constructor(TestCallback testCallback),
     ImplementedAs=TestObj
@@ -185,6 +187,10 @@ enum TestEnumType { "", "EnumValue1", "EnumValue2", "EnumValue3" };
     
     attribute any anyAttribute;
 
+    attribute TestCallbackFunction callbackFunctionAttribute;
+    TestCallbackFunction callbackFunctionReturnValue();
+    void callbackFunctionArgument(TestCallbackFunction function);
+
     // Overloads
     void    overloadedMethod(TestObject? objArg, [StrictTypeChecking] DOMString strArg);
     void    overloadedMethod(TestObject? objArg, optional long longArg);