Don't use Source to compute absolute URI in _getLibraryByRelativeUri().

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/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/handle.dart';
 import 'package:analyzer/src/dart/element/member.dart';
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/testing/ast_factory.dart';
 import 'package:analyzer/src/generated/testing/token_factory.dart';
+import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
+import 'package:analyzer/src/util/fast_uri.dart';
 
 /**
  * Implementation of [ElementResynthesizer] used when resynthesizing an element
  * model from summaries.
  */
 abstract class SummaryResynthesizer extends ElementResynthesizer {
   /**
    * The parent [SummaryResynthesizer] which is asked to resynthesize elements
    * and get summaries before this resynthesizer attempts to do this.
    * Can be `null`.
@@ skipping 1119 matching lines @@
     return null;
   }
 
   @override
   void patchTopLevelAccessors() {
     LibraryElementImpl library = resynthesizer.library;
     BuildLibraryElementUtils.patchTopLevelAccessors(library);
   }
 
   LibraryElementHandle _getLibraryByRelativeUri(String depUri) {
-    String absoluteUri = resynthesizer.summaryResynthesizer.sourceFactory
-        .resolveUri(resynthesizer.librarySource, depUri)
-        .uri
+    String absoluteUri = resolveRelativeUri(
+            resynthesizer.librarySource.uri, FastUri.parse(depUri))
         .toString();
     return new LibraryElementHandle(resynthesizer.summaryResynthesizer,
         new ElementLocationImpl.con3(<String>[absoluteUri]));
   }
 }
 
 /**
  * Data structure used during resynthesis to record all the information that is
  * known about how to resynthesize a single entry in [LinkedUnit.references]
  * (and its associated entry in [UnlinkedUnit.references], if it exists).
@@ skipping 681 matching lines @@
   static String _getElementIdentifier(String name, ReferenceKind kind) {
     if (kind == ReferenceKind.topLevelPropertyAccessor ||
         kind == ReferenceKind.propertyAccessor) {
       if (!name.endsWith('=')) {
         return name + '?';
       }
     }
     return name;
   }
 }