improve parser recovery for import statements

pkg/analysis_server/test/services/completion/keyword_contributor_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.completion.dart.keyword;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/keyword_contributor.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ skipping 422 matching lines @@
     expect(computeFast(), isTrue);
     assertSuggestKeywords([Keyword.DEFERRED], DART_RELEVANCE_HIGH);
   }
 
   test_import_deferred2() {
     addTestSource('import "foo" d^ as foo;');
     expect(computeFast(), isTrue);
     assertSuggestKeywords([Keyword.DEFERRED], DART_RELEVANCE_HIGH);
   }
 
+  test_import_deferred3() {
+    addTestSource('import "foo" d^ show foo;');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords([Keyword.AS, Keyword.DEFERRED], DART_RELEVANCE_HIGH);
+  }
+
+  test_import_deferred4() {
+    addTestSource('import "foo" d^ hide foo;');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords([Keyword.AS, Keyword.DEFERRED], DART_RELEVANCE_HIGH);
+  }
+
   test_import_deferred_not() {
     addTestSource('import "foo" as foo ^;');
     expect(computeFast(), isTrue);
     assertSuggestKeywords([], DART_RELEVANCE_HIGH);
   }
 
   test_import_deferred_as() {
     addTestSource('import "foo" ^;');
     expect(computeFast(), isTrue);
     assertSuggestKeywords([Keyword.AS, Keyword.DEFERRED], DART_RELEVANCE_HIGH);
@@ skipping 69 matching lines @@
     sorted.forEach((k) => msg.writeln('  Keyword.${k.name},'));
   }
 
   bool _equalSets(Iterable<Keyword> iter1, Iterable<Keyword> iter2) {
     if (iter1.length != iter2.length) return false;
     if (iter1.any((k) => !iter2.contains(k))) return false;
     if (iter2.any((k) => !iter1.contains(k))) return false;
     return true;
   }
 }