Correctly reflect on intercepted classes.

dart/sdk/lib/_internal/lib/js_helper.dart

 // Copyright (c) 2012, 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.
 
 library _js_helper;
 
 import 'dart:collection';
 import 'dart:_foreign_helper' show DART_CLOSURE_TO_JS,
                                    JS,
                                    JS_CALL_IN_ISOLATE,
@@ skipping 548 matching lines @@
     var jsFunction = JS('var', '#[#]', function, selectorName);
     if (jsFunction == null) {
       throw new NoSuchMethodError(function, selectorName, arguments, {});
     }
     // We bound 'this' to [function] because of how we compile
     // closures: escaped local variables are stored and accessed through
     // [function].
     return JS('var', '#.apply(#, #)', jsFunction, function, arguments);
   }
 
-  static getConstructor(String className) {
+  static getConstructorOrInterceptor(String className) {
     // TODO(ahe): Generalize this and improve test coverage of
     // reflecting on intercepted classes.
     if (JS('bool', '# == "String"', className)) return const JSString();
     if (JS('bool', '# == "int"', className)) return const JSInt();
     if (JS('bool', '# == "double"', className)) return const JSDouble();
     if (JS('bool', '# == "num"', className)) return const JSNumber();
     if (JS('bool', '# == "bool"', className)) return const JSBool();
     if (JS('bool', '# == "List"', className)) return const JSArray();
     return JS('var', '#[#]', JS_CURRENT_ISOLATE(), className);
   }
@@ skipping 869 matching lines @@
 }
 
 /**
  * Error thrown when a runtime error occurs.
  */
 class RuntimeError implements Error {
   final message;
   RuntimeError(this.message);
   String toString() => "RuntimeError: $message";
 }