rename completion computer to contributor

pkg/analysis_server/lib/src/services/completion/keyword_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.keyword;
+library services.completion.contributor.dart.keyword;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 
 /**
- * A computer for calculating `completion.getSuggestions` request results
+ * A contributor for calculating `completion.getSuggestions` request results
  * for the local library in which the completion is requested.
  */
-class KeywordComputer extends DartCompletionComputer {
+class KeywordContributor extends DartCompletionContributor {
   @override
   bool computeFast(DartCompletionRequest request) {
     request.target.containingNode.accept(new _KeywordVisitor(request));
     return true;
   }
 
   @override
   Future<bool> computeFull(DartCompletionRequest request) {
     return new Future.value(false);
   }
@@ skipping 134 matching lines @@
         return false;
       }
       AstNode parent = body.parent;
       if (parent is ConstructorDeclaration || parent is MethodDeclaration) {
         return true;
       }
       node = parent;
     }
   }
 }