Update Element/navigation/outline to use Location.

pkg/analysis_server/lib/src/analysis_server.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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/analysis_logger.dart';
@@ skipping 443 matching lines @@
 
   /**
    * Implementation for `analysis.setSubscriptions`.
    */
   void setAnalysisSubscriptions(Map<AnalysisService, Set<String>> subscriptions) {
     // send notifications for already analyzed sources
     subscriptions.forEach((service, Set<String> newFiles) {
       Set<String> oldFiles = analysisServices[service];
       Set<String> todoFiles = oldFiles != null ? newFiles.difference(oldFiles) : newFiles;
       for (String file in todoFiles) {
+        Source source = _getSource(file);
+        AnalysisContext context = _getAnalysisContext(file);
+        // errors
         if (service == AnalysisService.ERRORS) {
-          Source source = _getSource(file);
-          AnalysisContext analysisContext = _getAnalysisContext(file);
-          LineInfo lineInfo = analysisContext.getLineInfo(source);
-          List<AnalysisError> errors = analysisContext.getErrors(source).errors;
+          LineInfo lineInfo = context.getLineInfo(source);
+          List<AnalysisError> errors = context.getErrors(source).errors;
           sendAnalysisNotificationErrors(this, file, lineInfo, errors);
         }
         // Dart unit notifications.
         if (AnalysisEngine.isDartFileName(file)) {
           CompilationUnit dartUnit = getResolvedCompilationUnitToResendNotification(file);
           if (dartUnit != null) {
             switch (service) {
               case AnalysisService.HIGHLIGHTS:
                 sendAnalysisNotificationHighlights(this, file, dartUnit);
                 break;
               case AnalysisService.NAVIGATION:
                 // TODO(scheglov) consider support for one unit in 2+ libraries
                 sendAnalysisNotificationNavigation(this, file, dartUnit);
                 break;
               case AnalysisService.OUTLINE:
-                sendAnalysisNotificationOutline(this, file, dartUnit);
+                sendAnalysisNotificationOutline(this, context, source, dartUnit);
                 break;
             }
           }
         }
       }
     });
     // remember new subscriptions
     this.analysisServices = subscriptions;
   }
 
@@ skipping 102 matching lines @@
 /**
  * An enumeration of the services provided by the server domain.
  */
 class ServerService extends Enum2<ServerService> {
   static const ServerService STATUS = const ServerService('STATUS', 0);
 
   static const List<ServerService> VALUES = const [STATUS];
 
   const ServerService(String name, int ordinal) : super(name, ordinal);
 }