Revert "Change path-observer to lookup properties aggressively and report errors"

pkg/smoke/lib/mirrors.dart

 // Copyright (c) 2014, 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.
 
 /// Implementation of the smoke services using mirrors.
 library smoke.mirrors;
 
 import 'dart:mirrors';
 import 'package:smoke/smoke.dart';
 import 'package:logging/logging.dart';
@@ skipping 200 matching lines @@
 
 
 // TODO(jmesserly): workaround for:
 // https://code.google.com/p/dart/issues/detail?id=10029
 Symbol _setterName(Symbol getter) =>
     new Symbol('${MirrorSystem.getName(getter)}=');
 
 
 ClassMirror _safeSuperclass(ClassMirror type) {
   try {
-    var t = type.superclass;
-    // TODO(sigmund): workaround for darbug.com/17779.
-    // Interceptor is leaked by dart2js. It has the same methods as Object
-    // (including noSuchMethod), and our code above assumes that it doesn't
-    // exist. Most queries exclude Object, so they should exclude Interceptor
-    // too. We don't check for t.simpleName == #Interceptor because depending on
-    // dart2js optimizations it may be #Interceptor or #num/Interceptor.
-    // Checking for a private library seems to reliably filter this out.
-    if (t != null && t.owner != null && t.owner.isPrivate) {
-      t = _objectType;
-    }
-    return t;
+    return type.superclass;
   } on UnsupportedError catch (e) {
     // Note: dart2js throws UnsupportedError when the type is not reflectable.
     return _objectType;
   }
 }
 
 MethodMirror _findMethod(ClassMirror type, Symbol name) {
   do {
     var member = type.declarations[name];
     if (member is MethodMirror) return member;
@@ skipping 97 matching lines @@
   //     dartbug.com/16078).
   //   * having [call] also allows `is` checks to work for functions of 0
   //     through 3 arguments.  We depend on this in
   //     `polymer_expressions/lib/eval.dart` to check whether a function is a
   //     filter (takes a single argument). (Note that it's possible to include
   //     both [call] and [noSuchMethod], which would make instance-of checks
   //     work with the signature of [call], but will allow invoking the function
   //     using [noSuchMethod].
   call([a, b, c]) => invoke(receiver, methodName, [a, b, c], adjust: true);
 }