Implement SearchEngine.searchAllSubtypes() with the analysis driver.

pkg/analysis_server/lib/src/services/refactoring/rename_class_member.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.refactoring.rename_class_member;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol_server.dart'
     hide Element, ElementKind;
@@ skipping 146 matching lines @@
               "Class '{0}' already declares {1} with name '{2}'.",
               elementClass.displayName,
               getElementKindName(newNameMember),
               name),
           newLocation_fromElement(newNameMember));
     }
     // do chained computations
     Set<ClassElement> superClasses = getSuperClasses(elementClass);
     await _prepareReferences();
     Set<ClassElement> subClasses =
-        await getSubClasses(searchEngine, elementClass);
+        await searchEngine.searchAllSubtypes(elementClass);
     // check shadowing of class names
     if (element != null) {
       for (Element element in elements) {
         ClassElement clazz = element.enclosingElement;
         if (clazz.name == name) {
           result.addError(
               format(
                   "Renamed {0} has the same name as the declaring class '{1}'.",
                   elementKind.displayName,
                   name),
@@ skipping 130 matching lines @@
     }
   }
 }
 
 class _MatchShadowedByLocal {
   final SearchMatch match;
   final LocalElement localElement;
 
   _MatchShadowedByLocal(this.match, this.localElement);
 }