Revert 6ad38498c8673f1fbe3e12c49b1cf590305676dd (PARSED_UNIT).

pkg/analyzer/test/src/task/incremental_element_builder_test.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 analyzer.test.src.task.incremental_element_builder_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
@@ skipping 1985 matching lines @@
       context.setContents(source, newCode);
       newUnit = context.parseCompilationUnit(source);
       IncrementalCompilationUnitElementBuilder builder =
           new IncrementalCompilationUnitElementBuilder(oldUnit, newUnit);
       builder.build();
       unitDelta = builder.unitDelta;
       expect(newUnit.element, unitElement);
       // Flush all tokens, ASTs and elements.
       context.analysisCache.flush((target, result) {
         return result == TOKEN_STREAM ||
-            result == PARSED_UNIT1 ||
             result == PARSED_UNIT ||
             RESOLVED_UNIT_RESULTS.contains(result) ||
             LIBRARY_ELEMENT_RESULTS.contains(result);
       });
       // Compute a new AST with built elements.
       CompilationUnit newUnitFull = context.computeResult(
           new LibrarySpecificUnit(source, source), RESOLVED_UNIT1);
       expect(newUnitFull, isNot(same(newUnit)));
       new _BuiltElementsValidator().isEqualNodes(newUnitFull, newUnit);
     } finally {
@@ skipping 203 matching lines @@
           unitMember is ClassDeclaration && unitMember.name.name == name);
 }
 
 class _MaterializeLazyElementsVisitor extends GeneralizingElementVisitor {
   @override
   visitExecutableElement(ExecutableElement element) {
     element.parameters;
     super.visitExecutableElement(element);
   }
 }