respect show/hide combinators when generating suggestions

pkg/analysis_services/test/completion/completion_computer_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.suggestion;
 
 import 'dart:async';
 
 import 'package:analysis_services/completion/completion_computer.dart';
 import 'package:analysis_services/completion/completion_suggestion.dart';
@@ skipping 182 matching lines @@
     expect(this.fastCount, equals(1));
     expect(this.fullCount, equals(0));
   }
 
   assertFull(int fullCount) {
     expect(this.fastCount, equals(1));
     expect(this.fullCount, equals(fullCount));
   }
 
   @override
-  bool computeFast(CompilationUnit unit,
+  bool computeFast(CompilationUnit unit, AstNode node,
       List<CompletionSuggestion> suggestions) {
     fastCount++;
     if (fastSuggestion != null) {
       suggestions.add(fastSuggestion);
     }
     return fastSuggestion != null;
   }
 
   @override
-  Future<bool> computeFull(CompilationUnit unit,
+  Future<bool> computeFull(CompilationUnit unit, AstNode node,
       List<CompletionSuggestion> suggestions) {
     fullCount++;
     if (fullSuggestion != null) {
       suggestions.add(fullSuggestion);
     }
     return new Future.value(fullSuggestion != null);
   }
 }