Rename two more classes to prepare for the public API

pkg/analysis_server/lib/src/services/index/local_index.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.src.index.local_index;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/index_contributor.dart'
@@ skipping 26 matching lines @@
   /**
    * Returns all relations with [Element]s with the given [name].
    */
   Future<Map<List<String>, List<InspectLocation>>> findElementsByName(
       String name) {
     return _store.inspect_getElementRelations(name);
   }
 
   /**
    * Returns a `Future<List<Location>>` that completes with the list of
-   * [Location]s of the given [relationship] with the given [element].
+   * [LocationImpl]s of the given [relationship] with the given [element].
    *
    * For example, if the [element] represents a function and the [relationship]
    * is the `is-invoked-by` relationship, then the locations will be all of the
    * places where the function is invoked.
    */
   @override
-  Future<List<Location>> getRelationships(
-      Element element, Relationship relationship) {
+  Future<List<LocationImpl>> getRelationships(
+      Element element, RelationshipImpl relationship) {
     return _store.getRelationships(element, relationship);
   }
 
   @override
   List<Element> getTopLevelDeclarations(ElementNameFilter nameFilter) {
     return _store.getTopLevelDeclarations(nameFilter);
   }
 
   @override
   void indexHtmlUnit(AnalysisContext context, HtmlUnit unit) {
@@ skipping 23 matching lines @@
   @override
   void run() {
     // NO-OP for the local index
   }
 
   @override
   void stop() {
     // NO-OP for the local index
   }
 }