Rename NavigationHolder to NavigationCollector.

pkg/analysis_server/lib/src/domain_analysis.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 domain.analysis;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 
 import 'package:analysis_server/analysis/analysis_domain.dart';
@@ skipping 118 matching lines @@
     }
     analysisFuture.then((AnalysisDoneReason reason) {
       switch (reason) {
         case AnalysisDoneReason.COMPLETE:
           List<CompilationUnit> units =
               server.getResolvedCompilationUnits(file);
           if (units.isEmpty) {
             server.sendResponse(new Response.getNavigationInvalidFile(request));
           } else {
             CompilationUnitElement unitElement = units.first.element;
-            NavigationHolderImpl holder = computeNavigation(
+            NavigationCollectorImpl collector = computeNavigation(
                 server,
                 unitElement.context,
                 unitElement.source,
                 params.offset,
                 params.length);
             server.sendResponse(new AnalysisGetNavigationResult(
-                    holder.files, holder.targets, holder.regions)
+                    collector.files, collector.targets, collector.regions)
                 .toResponse(request.id));
           }
           break;
         case AnalysisDoneReason.CONTEXT_REMOVED:
           // The active contexts have changed, so try again.
           Response response = getNavigation(request);
           if (response != Response.DELAYED_RESPONSE) {
             server.sendResponse(response);
           }
           break;
@@ skipping 203 matching lines @@
       context.onResultComputed(descriptor).listen((result) {
         StreamController<engine.ComputedResult> controller =
             controllers[result.descriptor];
         if (controller != null) {
           controller.add(result);
         }
       });
     }
   }
 }