Add sourceFactory getter to AnalysisSession

pkg/analyzer/lib/dart/analysis/session.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:async';
 
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/src/dart/analysis/top_level_declaration.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * A consistent view of the results of analyzing one or more files.
  *
  * The methods in this class that return analysis results will throw an
  * [InconsistentAnalysisException] if the result to be returned might be
  * inconsistent with any previously returned results.
  *
  * Clients may not extend, implement or mix-in this class.
  */
 abstract class AnalysisSession {
   /**
+   * Return the source factory used to resolve URIs.
+   */
+  SourceFactory get sourceFactory;
+
+  /**
    * Return a type provider that is consistent with the results returned by this
    * session.
    */
   Future<TypeProvider> get typeProvider;
 
   /**
    * Return the type system being used by this session.
    */
   Future<TypeSystem> get typeSystem;
 
@@ skipping 65 matching lines @@
  * might be inconsistent with any previously returned results.
  */
 class InconsistentAnalysisException extends AnalysisException {
   /**
    * Initialize a newly created exception to have the given [message] and
    * [cause].
    */
   InconsistentAnalysisException([String message, CaughtException cause])
       : super(message, cause);
 }