Prepare for decoupling analyzer ASTs from element model.

pkg/analyzer/test/generated/non_error_resolver_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 analyzer.test.generated.non_error_resolver_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/resolution_accessors.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/error/codes.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'resolver_test_case.dart';
@@ skipping 1013 matching lines @@
  */
 class C = D with E;
 
 class D {}
 class E {}''');
     computeLibrarySourceErrors(source);
     computeLibrarySourceErrors(source);
     assertNoErrors(source);
     verify([source]);
     CompilationUnit unit = _getResolvedLibraryUnit(source);
-    ClassElement classC = unit.element.getType('C');
+    ClassElement classC = elementForCompilationUnit(unit).getType('C');
     expect(classC.documentationComment, isNotNull);
   }
 
   void test_commentReference_beforeConstructor() {
     String code = r'''
 abstract class A {
   /// [p]
   A(int p) {}
 }''';
     Source source = addSource(code);
@@ skipping 5209 matching lines @@
     reset();
   }
 
   void _check_wrongNumberOfParametersForOperator1(String name) {
     _check_wrongNumberOfParametersForOperator(name, "a");
   }
 
   CompilationUnit _getResolvedLibraryUnit(Source source) =>
       analysisContext.getResolvedCompilationUnit2(source, source);
 }