Rename NavigationHolder to NavigationCollector.

pkg/analysis_server/lib/src/domains/analysis/navigation.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 domains.analysis.navigation;
 
 import 'dart:collection';
 
 import 'package:analysis_server/analysis/navigation/navigation_core.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/collections.dart';
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, AnalysisEngine;
 import 'package:analyzer/src/generated/java_engine.dart' show CaughtException;
 import 'package:analyzer/src/generated/source.dart' show Source;
 
 /**
  * Compute all known navigation information for the given part of [source].
  */
-NavigationHolderImpl computeNavigation(AnalysisServer server,
+NavigationCollectorImpl computeNavigation(AnalysisServer server,
     AnalysisContext context, Source source, int offset, int length) {
-  NavigationHolderImpl holder = new NavigationHolderImpl();
+  NavigationCollectorImpl collector = new NavigationCollectorImpl();
   List<NavigationContributor> contributors =
       server.serverPlugin.navigationContributors;
   for (NavigationContributor contributor in contributors) {
     try {
-      contributor.computeNavigation(holder, context, source, offset, length);
+      contributor.computeNavigation(collector, context, source, offset, length);
     } catch (exception, stackTrace) {
       AnalysisEngine.instance.logger.logError(
           'Exception from navigation contributor: ${contributor.runtimeType}',
           new CaughtException(exception, stackTrace));
     }
   }
-  holder.sortRegions();
-  return holder;
+  collector.sortRegions();
+  return collector;
 }
 
 /**
- * A concrete implementation of  [NavigationHolder].
+ * A concrete implementation of  [NavigationCollector].
  */
-class NavigationHolderImpl implements NavigationHolder {
+class NavigationCollectorImpl implements NavigationCollector {
   /**
    * A list of navigation regions.
    */
   final List<protocol.NavigationRegion> regions = <protocol.NavigationRegion>[];
 
   /**
    * All the unique targets referenced by [regions].
    */
   final List<protocol.NavigationTarget> targets = <protocol.NavigationTarget>[];
   final Map<Pair<protocol.ElementKind, protocol.Location>, int> targetMap =
@@ skipping 44 matching lines @@
           location.offset,
           location.length,
           location.startLine,
           location.startColumn);
       targets.add(target);
       targetMap[pair] = index;
     }
     return index;
   }
 }