Mostly use Entity in InterceptorData

pkg/compiler/lib/src/compiler.dart

 // Copyright (c) 2012, 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.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'closure.dart' as closureMapping show ClosureTask;
@@ skipping 1974 matching lines @@
     if (constructor == null && required) {
       throw new SpannableAssertionFailure(
           cls,
           "The class '${cls.name}' does not contain "
           "required constructor: '$name'.");
     }
     return constructor?.declaration;
   }
 
   @override
+  void forEachClassMember(
+      ClassElement cls, void f(ClassElement declarer, MemberElement member)) {
+    cls.ensureResolved(_resolution);
+    cls.forEachMember((ClassElement declarer, MemberElement member) {
+      if (member.isSynthesized) return;
+      f(declarer, member);
+    }, includeSuperAndInjectedMembers: true);
+  }
+
+  @override
+  void forEachMixin(ClassElement cls, void f(ClassElement mixin)) {
+    for (; cls != null; cls = cls.superclass) {
+      if (cls.isMixinApplication) {
+        MixinApplicationElement mixinApplication = cls;
+        f(mixinApplication.mixin);
+      }
+    }
+  }
+
+  @override
   MemberElement lookupLibraryMember(LibraryElement library, String name,
       {bool setter: false, bool required: false}) {
     Element member = library.implementation.findLocal(name);
     if (member != null && member.isAbstractField) {
       AbstractFieldElement abstractField = member;
       if (setter) {
         member = abstractField.setter;
       } else {
         member = abstractField.getter;
       }
@@ skipping 32 matching lines @@
     if (library != null && library.isSynthesized) {
       return null;
     }
     if (library == null && required) {
       throw new SpannableAssertionFailure(
           library, "The library '${uri}' was not found.");
     }
     return library;
   }
 }