Implement SearchEngine.searchAllSubtypes() with the analysis driver.

pkg/analysis_server/lib/src/domains/analysis/implemented_dart.dart

 // Copyright (c) 2015, 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.implemented_dart;
 
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
-import 'package:analysis_server/src/services/search/hierarchy.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/dart/element/element.dart';
 
 class ImplementedComputer {
   final SearchEngine searchEngine;
   final CompilationUnitElement unitElement;
 
   List<protocol.ImplementedClass> classes = <protocol.ImplementedClass>[];
   List<protocol.ImplementedMember> members = <protocol.ImplementedMember>[];
 
   Set<ClassElement> subtypes;
 
   ImplementedComputer(this.searchEngine, this.unitElement);
 
   compute() async {
     for (ClassElement type in unitElement.types) {
       // always include Object and its members
       if (type.supertype == null) {
         _addImplementedClass(type);
         type.accessors.forEach(_addImplementedMember);
         type.fields.forEach(_addImplementedMember);
         type.methods.forEach(_addImplementedMember);
         continue;
       }
       // analyze ancestors
-      subtypes = await getSubClasses(searchEngine, type);
+      subtypes = await searchEngine.searchAllSubtypes(type);
       if (subtypes.isNotEmpty) {
         _addImplementedClass(type);
       }
       type.accessors.forEach(_addMemberIfImplemented);
       type.fields.forEach(_addMemberIfImplemented);
       type.methods.forEach(_addMemberIfImplemented);
     }
   }
 
   void _addImplementedClass(ClassElement type) {
@@ skipping 39 matching lines @@
    */
   static bool _isStatic(Element element) {
     if (element is ExecutableElement) {
       return element.isStatic;
     } else if (element is PropertyInducingElement) {
       return element.isStatic;
     }
     return false;
   }
 }