Enable enum and deferred import support

pkg/analyzer/test/generated/incremental_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 engine.incremental_resolver_test;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
@@ skipping 299 matching lines @@
 }
 ''', r'''
 class A {
   int field;
   A([this.field = 0]);
 }
 ''');
   }
 
   void test_false_enum_constants_add() {
-    resetWithEnum();
     _assertDoesNotMatch(r'''
 enum E {A, B}
 ''', r'''
 enum E {A, B, C}
 ''');
   }
 
   void test_false_enum_constants_remove() {
-    resetWithEnum();
     _assertDoesNotMatch(r'''
 enum E {A, B, C}
 ''', r'''
 enum E {A, B}
 ''');
   }
 
   void test_false_export_hide_add() {
     _assertDoesNotMatch(r'''
 export 'dart:async' hide Future;
@@ skipping 1023 matching lines @@
 }
 ''', r'''
 class A {
   int field;
   A([this.field = 0]);
 }
 ''');
   }
 
   void test_true_enum_constants_reorder() {
-    resetWithEnum();
     _assertMatches(r'''
 enum E {A, B, C}
 ''', r'''
 enum E {C, A, B}
 ''');
   }
 
   void test_true_enum_list_reorder() {
-    resetWithEnum();
     _assertMatches(r'''
 enum A {A1, A2, A3}
 enum B {B1, B2, B3}
 enum C {C1, C2, C3}
 ''', r'''
 enum C {C1, C2, C3}
 enum A {A1, A2, A3}
 enum B {B1, B2, B3}
 ''');
   }
 
   void test_true_enum_list_same() {
-    resetWithEnum();
     _assertMatches(r'''
 enum A {A1, A2, A3}
 enum B {B1, B2, B3}
 enum C {C1, C2, C3}
 ''', r'''
 enum A {A1, A2, A3}
 enum B {B1, B2, B3}
 enum C {C1, C2, C3}
 ''');
   }
@@ skipping 1991 matching lines @@
   }
 }
 
 
 class _Edit {
   final int offset;
   final int length;
   final String replacement;
   _Edit(this.offset, this.length, this.replacement);
 }