Restore UriReferencedElement and its uri/uriOffset/uriEnd properties.

pkg/analyzer/lib/src/summary/resynthesize.dart

 // Copyright (c) 2015, 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 summary_resynthesizer;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_ast_factory.dart';
@@ skipping 1020 matching lines @@
    * Create a [_UnitResynthesizer] that will resynthesize the part with the
    * given [uri]. Return `null` if the [uri] is invalid.
    */
   _UnitResynthesizer buildPart(_UnitResynthesizer definingUnitResynthesizer,
       String uri, UnlinkedPart partDecl, int unitNum) {
     Source unitSource =
         summaryResynthesizer.sourceFactory.resolveUri(librarySource, uri);
     _UnitResynthesizer partResynthesizer =
         createUnitResynthesizer(unitNum, unitSource, partDecl);
     CompilationUnitElementImpl partUnit = partResynthesizer.unit;
+    partUnit.uriOffset = partDecl.uriOffset;
+    partUnit.uriEnd = partDecl.uriEnd;
     partUnit.source = unitSource;
     partUnit.librarySource = librarySource;
+    partUnit.uri = uri;
     return partResynthesizer;
   }
 
   /**
    * Set up data structures for deserializing a compilation unit.
    */
   _UnitResynthesizer createUnitResynthesizer(
       int unitNum, Source unitSource, UnlinkedPart unlinkedPart) {
     LinkedUnit linkedUnit = linkedLibrary.units[unitNum];
     UnlinkedUnit unlinkedUnit = unlinkedUnits[unitNum];
@@ skipping 933 matching lines @@
   static String _getElementIdentifier(String name, ReferenceKind kind) {
     if (kind == ReferenceKind.topLevelPropertyAccessor ||
         kind == ReferenceKind.propertyAccessor) {
       if (!name.endsWith('=')) {
         return name + '?';
       }
     }
     return name;
   }
 }