Share more logic between the Ssa(Ast)Builder and SsaKernelBuilder

pkg/compiler/lib/src/js_emitter/type_test_registry.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 dart2js.js_emitter.type_test_registry;
 
 import '../common.dart';
 import '../common_elements.dart';
 import '../elements/elements.dart'
     show ClassElement, ElementKind, MemberElement, MethodElement;
@@ skipping 79 matching lines @@
   Set<ClassElement> computeClassesModifiedByEmitRuntimeTypeSupport() {
     TypeChecks typeChecks = rtiChecks.requiredChecks;
     Set<ClassElement> result = new Set<ClassElement>();
     for (ClassElement cls in typeChecks.classes) {
       if (typeChecks[cls].isNotEmpty) result.add(cls);
     }
     return result;
   }
 
   void computeRtiNeededClasses(RuntimeTypesSubstitutions rtiSubstitutions,
-      MirrorsData mirrorsData, Iterable<MemberElement> liveMembers) {
+      MirrorsData mirrorsData, Iterable<MemberEntity> liveMembers) {
     _rtiNeededClasses = new Set<ClassEntity>();
 
     void addClassWithSuperclasses(ClassElement cls) {
       _rtiNeededClasses.add(cls);
       for (ClassElement superclass = cls.superclass;
           superclass != null;
           superclass = superclass.superclass) {
         _rtiNeededClasses.add(superclass);
       }
     }
@@ skipping 78 matching lines @@
     checkedFunctionTypes = new Set<ResolutionFunctionType>();
     _codegenWorldBuilder.isChecks.forEach((ResolutionDartType t) {
       if (t is ResolutionInterfaceType) {
         checkedClasses.add(t.element);
       } else if (t is ResolutionFunctionType) {
         checkedFunctionTypes.add(t);
       }
     });
   }
 }