Fix several element properties in serialization.

pkg/compiler/lib/src/elements/modelx.dart

 // Copyright (c) 2013, 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 elements.modelx;
 
 import '../common.dart';
 import '../common/resolution.dart' show Resolution, ParsingContext;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_constructors.dart';
@@ skipping 1827 matching lines @@
 
   MemberElement get memberContext => enclosingElement;
 
   bool get isLocal => false;
 
   bool get isMalformed => true;
 
   DynamicType get type => const DynamicType();
 }
 
-class AbstractFieldElementX extends ElementX implements AbstractFieldElement {
+class AbstractFieldElementX extends ElementX
+    with AbstractFieldElementCommon
+    implements AbstractFieldElement {
   GetterElementX getter;
   SetterElementX setter;
 
   AbstractFieldElementX(String name, Element enclosing)
       : super(name, ElementKind.ABSTRACT_FIELD, enclosing);
 
   DartType computeType(Compiler compiler) {
     throw "internal error: AbstractFieldElement has no type";
   }
 
@@ skipping 22 matching lines @@
     // The resolver ensures that the flags match (ignoring abstract).
     if (getter != null) {
       return new Modifiers.withFlags(getter.modifiers.nodes,
           getter.modifiers.flags | Modifiers.FLAG_ABSTRACT);
     } else {
       return new Modifiers.withFlags(setter.modifiers.nodes,
           setter.modifiers.flags | Modifiers.FLAG_ABSTRACT);
     }
   }
 
-  bool get isInstanceMember {
-    return isClassMember && !isStatic;
-  }
-
   accept(ElementVisitor visitor, arg) {
     return visitor.visitAbstractFieldElement(this, arg);
   }
-
-  bool get isAbstract {
-    return getter != null && getter.isAbstract ||
-        setter != null && setter.isAbstract;
-  }
 }
 
 // TODO(johnniwinther): [FunctionSignature] should be merged with
 // [FunctionType].
 // TODO(karlklose): all these lists should have element type [FormalElement].
 class FunctionSignatureX extends FunctionSignatureCommon
     implements FunctionSignature {
   final List<DartType> typeVariables;
   final List<Element> requiredParameters;
   final List<Element> optionalParameters;
@@ skipping 1380 matching lines @@
       body = node.asFunctionExpression().body;
     }
     return new ParsedResolvedAst(
         declaration,
         node,
         body,
         definingElement.treeElements,
         definingElement.compilationUnit.script.resourceUri);
   }
 }