replace request.node with request.target.containingNode in more situations

pkg/analysis_server/lib/src/services/completion/suggestion_builder.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.suggestion.builder;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
@@ skipping 359 matching lines @@
       typesToVisit.addAll(nextType.mixins);
     }
     return result;
   }
 
   /**
    * Add suggestions for the visible members in the given interface
    */
   static void suggestionsFor(DartCompletionRequest request, DartType type) {
     CompilationUnit compilationUnit =
-        request.node.getAncestor((AstNode node) => node is CompilationUnit);
+        request.target.containingNode.getAncestor((n) => n is CompilationUnit);
     LibraryElement library = compilationUnit.element.library;
     if (type is DynamicTypeImpl) {
       type = request.cache.objectClassElement.type;
     }
     if (type is InterfaceType) {
       return new InterfaceTypeSuggestionBuilder(request)._buildSuggestions(
           type, library);
     }
   }
 }
@@ skipping 44 matching lines @@
       addSuggestion(element);
     }
   }
 
   /**
    * Add suggestions for the visible members in the given library
    */
   static void suggestionsFor(DartCompletionRequest request,
       CompletionSuggestionKind kind, LibraryElement library, bool typesOnly) {
     if (library != null) {
-      library.visitChildren(new LibraryElementSuggestionBuilder(request, kind, typesOnly));
+      library.visitChildren(
+          new LibraryElementSuggestionBuilder(request, kind, typesOnly));
     }
   }
 }
 
 /**
  * This class visits elements in a class and provides suggestions based upon
  * the visible named constructors in that class.
  */
 class NamedConstructorSuggestionBuilder extends GeneralizingElementVisitor
     with ElementSuggestionBuilder implements SuggestionBuilder {
@@ skipping 121 matching lines @@
    * or `false` if [computeFull] should be called.
    */
   bool computeFast(AstNode node);
 
   /**
    * Return a future that computes the suggestions given a fully resolved AST.
    * The future returns `true` if suggestions were added, else `false`.
    */
   Future<bool> computeFull(AstNode node);
 }