Support user class in compile_from_dill_test

pkg/compiler/lib/src/ssa/locals_handler.dart

 // Copyright (c) 2016, 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.
 
 import '../closure.dart';
 import '../common.dart';
 import '../elements/elements.dart';
 import '../elements/entities.dart';
 import '../elements/types.dart';
 import '../io/source_information.dart';
@@ skipping 613 matching lines @@
     });
     return this;
   }
 
   TypeMask cachedTypeOfThis;
 
   TypeMask getTypeOfThis() {
     TypeMask result = cachedTypeOfThis;
     if (result == null) {
       ThisLocal local = closureData.thisLocal;
-      ClassElement cls = local.enclosingClass;
+      ClassEntity cls = local.enclosingClass;
       if (closedWorld.isUsedAsMixin(cls)) {
         // If the enclosing class is used as a mixin, [:this:] can be
         // of the class that mixins the enclosing class. These two
         // classes do not have a subclass relationship, so, for
         // simplicity, we mark the type as an interface type.
-        result = new TypeMask.nonNullSubtype(cls.declaration, closedWorld);
+        result = new TypeMask.nonNullSubtype(cls, closedWorld);
       } else {
-        result = new TypeMask.nonNullSubclass(cls.declaration, closedWorld);
+        result = new TypeMask.nonNullSubclass(cls, closedWorld);
       }
       cachedTypeOfThis = result;
     }
     return result;
   }
 
   Map<Element, TypeMask> cachedTypesOfCapturedVariables =
       new Map<Element, TypeMask>();
 
   TypeMask getTypeOfCapturedVariable(FieldElement element) {
@@ skipping 23 matching lines @@
   final MemberEntity memberContext;
 
   // Avoid slow Object.hashCode.
   final int hashCode = _nextHashCode = (_nextHashCode + 1).toUnsigned(30);
   static int _nextHashCode = 0;
 
   SyntheticLocal(this.name, this.executableContext, this.memberContext);
 
   toString() => 'SyntheticLocal($name)';
 }