Fix for translation of \!= to \!identical(), but use == and \!= for Enum.

pkg/analyzer/lib/src/generated/sdk.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.sdk;
 
 import 'source.dart' show ContentCache, Source, UriKind;
@@ skipping 225 matching lines @@
 
   /**
    * The value of the [PLATFORMS] parameter used to specify that the library can
    * be used on the VM.
    */
   static String _VM_PLATFORM = "VM_PLATFORM";
 
   /**
    * A flag indicating whether the dart2js path should be used when it is available.
    */
-  bool _useDart2jsPaths = false;
+  final bool _useDart2jsPaths;
 
   /**
    * The library map that is populated by visiting the AST structure parsed from the contents of
    * the libraries file.
    */
   LibraryMap _librariesMap = new LibraryMap();
 
   /**
    * Initialize a newly created library builder to use the dart2js path if the given value is
    * `true`.
    *
    * @param useDart2jsPaths `true` if the dart2js path should be used when it is available
    */
-  SdkLibrariesReader_LibraryBuilder(bool useDart2jsPaths) {
-    this._useDart2jsPaths = useDart2jsPaths;
-  }
+  SdkLibrariesReader_LibraryBuilder(this._useDart2jsPaths);
 
   /**
    * Return the library map that was populated by visiting the AST structure parsed from the
    * contents of the libraries file.
    *
    * @return the library map describing the contents of the SDK
    */
   LibraryMap get librariesMap => _librariesMap;
 
   @override
@@ skipping 160 matching lines @@
 
   /**
    * Return the source representing the library with the given `dart:` URI, or `null` if
    * the given URI does not denote a library in this SDK.
    *
    * @param dartUri the URI of the library to be returned
    * @return the source representing the specified library
    */
   Source mapDartUri(String dartUri);
 }