add keyword suggestions

pkg/analysis_services/lib/src/completion/dart_completion_manager.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;
 
 import 'dart:async';
 
 import 'package:analysis_services/completion/completion_computer.dart';
 import 'package:analysis_services/completion/completion_suggestion.dart';
 import 'package:analysis_services/search/search_engine.dart';
 import 'package:analysis_services/src/completion/imported_type_computer.dart';
+import 'package:analysis_services/src/completion/keyword_computer.dart';
 import 'package:analysis_services/src/completion/invocation_computer.dart';
 import 'package:analysis_services/src/completion/local_computer.dart';
 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/source.dart';
 
 /**
  * Manages code completion for a given Dart file completion request.
  */
@@ skipping 50 matching lines @@
       });
     });
   }
 
   /**
    * Build and initialize the list of completion computers
    */
   void initComputers() {
     if (computers == null) {
       computers = [
+          new KeywordComputer(),
           new LocalComputer(),
           new ImportedTypeComputer(),
           new InvocationComputer()];
     }
     computers.forEach((CompletionComputer c) {
       c.context = context;
       c.source = source;
       c.offset = offset;
       c.searchEngine = searchEngine;
     });
@@ skipping 18 matching lines @@
     if (library != null) {
       var unit = context.getResolvedCompilationUnit(source, library);
       if (unit != null) {
         return new Future.value(unit);
       }
     }
     //TODO (danrubel) Determine if analysis is complete but unit not resolved
     return new Future(waitForAnalysis);
   }
 }