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

pkg/compiler/lib/src/serialization/modelz.dart

Index: pkg/compiler/lib/src/serialization/modelz.dart
diff --git a/pkg/compiler/lib/src/serialization/modelz.dart b/pkg/compiler/lib/src/serialization/modelz.dart
index c909f9acf56e4b26405ae9635102f41815c643d6..a03ef2f2b12f68251d0365defecf0bac6df40494 100644
--- a/pkg/compiler/lib/src/serialization/modelz.dart
+++ b/pkg/compiler/lib/src/serialization/modelz.dart
@@ -112,6 +112,7 @@ abstract class ElementZ extends Element with ElementCommon {
   @override
   bool get isTopLevel => false;
 
+  // TODO(johnniwinther): Support metadata.
   @override
   Iterable<MetadataAnnotation> get metadata => const <MetadataAnnotation>[];
 
@@ -121,7 +122,6 @@ abstract class ElementZ extends Element with ElementCommon {
 
 abstract class DeserializedElementZ extends ElementZ {
   ObjectDecoder _decoder;
-  List<MetadataAnnotation> _metadata;
 
   DeserializedElementZ(this._decoder);
 
@@ -147,27 +147,6 @@ abstract class DeserializedElementZ extends ElementZ {
     }
     return new SourceSpan(uri, offset, offset + length);
   }
-
-  @override
-  Iterable<MetadataAnnotation> get metadata {
-    if (_metadata == null) {
-      _metadata = <MetadataAnnotation>[];
-      ListDecoder list = _decoder.getList(Key.METADATA, isOptional: true);
-      if (list != null) {
-        for (int index = 0; index < list.length; index++) {
-          ObjectDecoder object = list.getObject(index);
-          Element element = object.getElement(Key.ELEMENT);
-          Uri uri = object.getUri(Key.URI);
-          int offset = object.getInt(Key.OFFSET);
-          int length = object.getInt(Key.LENGTH);
-          ConstantExpression constant = object.getConstant(Key.CONSTANT);
-          _metadata.add(new MetadataAnnotationZ(
-              element, new SourceSpan(uri, offset, offset + length), constant));
-        }
-      }
-    }
-    return _metadata;
-  }
 }
 
 /// Deserializer for a collection of member elements serialized as a map from
@@ -967,9 +946,6 @@ class ClassElementZ extends DeserializedElementZ
   bool get isProxy => _decoder.getBool(Key.IS_PROXY);
 
   @override
-  bool get isInjected => _decoder.getBool(Key.IS_INJECTED);
-
-  @override
   bool get isUnnamedMixinApplication => false;
 
   @override
@@ -1504,9 +1480,6 @@ abstract class MemberElementMixin
 
   @override
   List<FunctionElement> get nestedClosures => <FunctionElement>[];
-
-  @override
-  bool get isInjected => _decoder.getBool(Key.IS_INJECTED);
 }
 
 abstract class FieldElementZ extends DeserializedElementZ
@@ -2290,25 +2263,3 @@ class PrefixElementZ extends DeserializedElementZ
     return _unsupported('lookupLocalMember');
   }
 }
-
-class MetadataAnnotationZ implements MetadataAnnotation {
-  final Element annotatedElement;
-  final SourceSpan sourcePosition;
-  final ConstantExpression constant;
-
-  MetadataAnnotationZ(
-      this.annotatedElement, this.sourcePosition, this.constant);
-
-  @override
-  MetadataAnnotation ensureResolved(Resolution resolution) {
-    // Do nothing.
-  }
-
-  @override
-  Node get node => throw new UnsupportedError('${this}.node');
-
-  @override
-  bool get hasNode => false;
-
-  String toString() => 'MetadataAnnotationZ(${constant.toDartText()})';
-}