Stop using Element.computeNode() in refactorings and fixes.

pkg/analysis_server/test/services/correction/fix_test.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 test.services.correction.fix;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
 import 'package:analysis_server/plugin/protocol/protocol.dart'
     hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
+import 'package:analyzer/src/dart/analysis/ast_provider_driver.dart';
+import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/error/codes.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/parser.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../../abstract_single_unit.dart';
 
 main() {
@@ skipping 124 matching lines @@
 
   /**
    * Computes fixes for the given [error] in [testUnit].
    */
   Future<List<Fix>> _computeFixes(AnalysisError error) async {
     if (enableNewAnalysisDriver) {
       DartFixContext fixContext = new _DartFixContextImpl(
           provider,
           driver.getTopLevelNameDeclarations,
           resolutionMap.elementDeclaredByCompilationUnit(testUnit).context,
+          new AstProviderForDriver(driver),
           testUnit,
           error);
       return await new DefaultFixContributor().internalComputeFixes(fixContext);
     } else {
       FixContextImpl fixContext = new FixContextImpl(provider, context, error);
       DefaultFixContributor contributor = new DefaultFixContributor();
       return contributor.computeFixes(fixContext);
     }
   }
 
@@ skipping 5466 matching lines @@
   @override
   final ResourceProvider resourceProvider;
 
   @override
   final GetTopLevelDeclarations getTopLevelDeclarations;
 
   @override
   final AnalysisContext analysisContext;
 
   @override
+  final AstProvider astProvider;
+
+  @override
   final CompilationUnit unit;
 
   @override
   final AnalysisError error;
 
   _DartFixContextImpl(this.resourceProvider, this.getTopLevelDeclarations,
-      this.analysisContext, this.unit, this.error);
+      this.analysisContext, this.astProvider, this.unit, this.error);
 }