Add parser support for using a URI in a part-of directive

pkg/analyzer/lib/src/generated/engine.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.
 
 library analyzer.src.generated.engine;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1137 matching lines @@
    * Object, and are allowed to reference `super`.
    */
   bool get enableSuperMixins;
 
   /**
    * Return `true` if timing data should be gathered during execution.
    */
   bool get enableTiming;
 
   /**
+   * Return `true` to enable the use of URIs in part-of directives.
+   */
+  bool get enableUriInPartOf;
+
+  /**
    * Return a list of error processors that are to be used when reporting
    * errors in some analysis context.
    */
   List<ErrorProcessor> get errorProcessors;
 
   /**
    * Return a list of exclude patterns used to exclude some sources from
    * analysis.
    */
   List<String> get excludePatterns;
@@ skipping 176 matching lines @@
    * some analysis context.
    */
   List<ErrorProcessor> _errorProcessors;
 
   /**
    * A list of exclude patterns used to exclude some sources from analysis.
    */
   List<String> _excludePatterns;
 
   @override
+  bool enableUriInPartOf = false;
+
+  @override
   bool generateImplicitErrors = true;
 
   @override
   bool generateSdkErrors = false;
 
   @override
   bool hint = true;
 
   @override
   bool incremental = false;
@@ skipping 1426 matching lines @@
    */
   bool get wereSourcesAdded => _changeSet.addedSources.length > 0;
 
   /**
    * Return `true` if any sources were removed or deleted.
    */
   bool get wereSourcesRemoved =>
       _changeSet.removedSources.length > 0 ||
       _changeSet.removedContainers.length > 0;
 }