Re-enable mirrors/immutable_collections_test on Dartium. Fix a bad constructor in Dartium's dart:js…

sdk/lib/js/dartium/js_dartium.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Support for interoperating with JavaScript.
  * 
  * This library provides access to JavaScript objects from Dart, allowing
  * Dart code to get and set properties, and call methods of JavaScript objects
  * and invoke JavaScript functions. The library takes care of converting
@@ skipping 221 matching lines @@
     }
   }
 
   _callMethod(String name, List args) native "JsObject_callMethod";
 }
 
 /**
  * Proxies a JavaScript Function object.
  */
 class JsFunction extends JsObject {
-  JsFunction.internal();
+  JsFunction.internal() : super.internal();
 
   /**
    * Returns a [JsFunction] that captures its 'this' binding and calls [f]
    * with the value of this passed as the first argument.
    */
   factory JsFunction.withThis(Function f) => _withThis(f);
 
   /**
    * Invokes the JavaScript function with arguments [args]. If [thisArg] is
    * supplied it is the value of `this` for the invocation.
@@ skipping 120 matching lines @@
 /**
  * Returns a method that can be called with an arbitrary number (for n less
  * than 11) of arguments without violating Dart type checks.
  */
 Function _wrapAsDebuggerVarArgsFunction(JsFunction jsFunction) =>
   ([a1=_UNDEFINED, a2=_UNDEFINED, a3=_UNDEFINED, a4=_UNDEFINED,
     a5=_UNDEFINED, a6=_UNDEFINED, a7=_UNDEFINED, a8=_UNDEFINED,
     a9=_UNDEFINED, a10=_UNDEFINED]) =>
     jsFunction._applyDebuggerOnly(_stripUndefinedArgs(
         [a1,a2,a3,a4,a5,a6,a7,a8,a9,a10]));