Fix StringSource.

pkg/analyzer_experimental/lib/src/string_source.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.
 
 library analyzer.string_source;
 
 import 'generated/source.dart';
 
 /// An implementation of [Source] that's based on an in-memory Dart string.
 class StringSource implements Source {
   final String _contents;
   final String fullName;
   final int modificationStamp;
 
   StringSource(this._contents, this.fullName)
       : modificationStamp = new DateTime.now().millisecondsSinceEpoch;
 
-  bool operator==(Object object) => object is StringSource &&
-      object._contents == _contents && object._name == _name;
+  bool operator==(Object object) {
+    if (object is StringSource) {
+      StringSource ssObject = object;
+      return ssObject._contents == _contents && ssObject.fullName == fullName;
+    }
+    return false;
+  }
 
   bool exists() => true;
 
   void getContents(Source_ContentReceiver receiver) =>
       receiver.accept2(_contents, modificationStamp);
 
-  String get encoding => throw UnsupportedError("StringSource doesn't support "
+  String get encoding => throw new UnsupportedError("StringSource doesn't support "
       "encoding.");
 
   String get shortName => fullName;
 
-  String get uriKind => throw UnsupportedError("StringSource doesn't support "
+  UriKind get uriKind => throw new UnsupportedError("StringSource doesn't support "
       "uriKind.");
 
-  int get hashCode => _contents.hashCode ^ _name.hashCode;
+  int get hashCode => _contents.hashCode ^ fullName.hashCode;
 
   bool get isInSystemLibrary => false;
 
-  Source resolveRelative(Uri relativeUri) => throw UnsupportedError(
+  Source resolveRelative(Uri relativeUri) => throw new UnsupportedError(
       "StringSource doesn't support resolveRelative.");
 }