add code completion declared and return types

pkg/analysis_server/lib/src/services/completion/invocation_computer.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 services.completion.computer.dart.invocation;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/suggestion_builder.dart';
@@ skipping 84 matching lines @@
         if (directive.prefix != null) {
           if (directive.prefix.name == element.name) {
             // Suggest elements from the imported library
             LibraryElement library = directive.uriElement;
             LibraryElementSuggestionBuilder.suggestionsFor(request, library);
             modified = true;
           }
         }
       }
     });
-
-    element.importedLibraries.forEach((LibraryElement library) {
-      modified = true;
-      library.accept(new ClassElementSuggestionBuilder(request));
-    });
     return new Future.value(modified);
   }
 
   @override
   Future<bool> visitVariableElement(VariableElement element) {
     DartType type = element.type;
     if (type != null) {
-      Element typeElement = type.element;
-      ClassElementSuggestionBuilder.suggestionsFor(request, typeElement);
+      ClassElementSuggestionBuilder.suggestionsFor(request, type.element);
     }
     return new Future.value(true);
   }
 }