rename completion computer to contributor

pkg/analysis_server/lib/src/services/completion/local_declaration_visitor.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.local.Declaration.visitor;
+library services.completion.dart.local.declaration.visitor;
 
 import 'package:analysis_server/src/services/completion/suggestion_builder.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 
 /**
  * `LocalDeclarationCollector` visits an [AstNode] and its parent recursively
  * along with any declarations in those nodes. Consumers typically call [visit]
  * which catches the exception thrown by [finished()].
  */
@@ skipping 245 matching lines @@
       });
     }
   }
 }
 
 /**
  * Internal exception used to indicate that [LocalDeclarationVisitor]
  * should stop visiting.
  */
 class _LocalDeclarationVisitorFinished {}