Revert "Remove Registry from registerMetadataConstant" and "Serialize metadata"

pkg/compiler/lib/src/elements/elements.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 elements;
 
 import '../common.dart';
 import '../common/resolution.dart' show Resolution;
 import '../compiler.dart' show Compiler;
 import '../constants/constructors.dart';
@@ skipping 1602 matching lines @@
 
   /// The upper bound on the type variable. If not explicitly declared, this is
   /// `Object`.
   DartType get bound;
 }
 
 abstract class MetadataAnnotation implements Spannable {
   /// The front-end constant of this metadata annotation.
   ConstantExpression get constant;
   Element get annotatedElement;
-  SourceSpan get sourcePosition;
+  int get resolutionState;
+  Token get beginToken;
+  Token get endToken;
 
   bool get hasNode;
   Node get node;
 
   MetadataAnnotation ensureResolved(Resolution resolution);
 }
 
 /// An [Element] that has a type.
 abstract class TypedElement extends Element {
   /// Do not use [computeType] outside of the resolver; instead retrieve the
@@ skipping 209 matching lines @@
   /// by a field.
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }