Support forEachClassMember on closure classes

pkg/compiler/lib/src/js_emitter/metadata_collector.dart

Index: pkg/compiler/lib/src/js_emitter/metadata_collector.dart
diff --git a/pkg/compiler/lib/src/js_emitter/metadata_collector.dart b/pkg/compiler/lib/src/js_emitter/metadata_collector.dart
index 8ba3d0ad9d5815693980eefdbdf68f1c87d54d9b..c6ca97da159814207c9228b6c3177beb97ee0b1f 100644
--- a/pkg/compiler/lib/src/js_emitter/metadata_collector.dart
+++ b/pkg/compiler/lib/src/js_emitter/metadata_collector.dart
@@ -167,8 +167,8 @@ class MetadataCollector implements jsAst.TokenFinalizer {
   }
 
   /// A map used to canonicalize the entries of types.
-  Map<OutputUnit, Map<ResolutionDartType, _BoundMetadataEntry>> _typesMap =
-      <OutputUnit, Map<ResolutionDartType, _BoundMetadataEntry>>{};
+  Map<OutputUnit, Map<DartType, _BoundMetadataEntry>> _typesMap =
+      <OutputUnit, Map<DartType, _BoundMetadataEntry>>{};
 
   MetadataCollector(
       this._options,
@@ -333,8 +333,7 @@ class MetadataCollector implements jsAst.TokenFinalizer {
         ignoreTypeVariables: ignoreTypeVariables);
   }
 
-  jsAst.Expression reifyTypeForOutputUnit(
-      ResolutionDartType type, OutputUnit outputUnit,
+  jsAst.Expression reifyTypeForOutputUnit(DartType type, OutputUnit outputUnit,
       {ignoreTypeVariables: false}) {
     return addTypeInOutputUnit(type, outputUnit,
         ignoreTypeVariables: ignoreTypeVariables);
@@ -361,7 +360,7 @@ class MetadataCollector implements jsAst.TokenFinalizer {
     });
   }
 
-  jsAst.Expression _computeTypeRepresentation(ResolutionDartType type,
+  jsAst.Expression _computeTypeRepresentation(DartType type,
       {ignoreTypeVariables: false}) {
     jsAst.Expression representation =
         _rtiEncoder.getTypeRepresentation(_emitter, type, (variable) {
@@ -381,12 +380,10 @@ class MetadataCollector implements jsAst.TokenFinalizer {
     return representation;
   }
 
-  jsAst.Expression addTypeInOutputUnit(
-      ResolutionDartType type, OutputUnit outputUnit,
+  jsAst.Expression addTypeInOutputUnit(DartType type, OutputUnit outputUnit,
       {ignoreTypeVariables: false}) {
     if (_typesMap[outputUnit] == null) {
-      _typesMap[outputUnit] =
-          new Map<ResolutionDartType, _BoundMetadataEntry>();
+      _typesMap[outputUnit] = new Map<DartType, _BoundMetadataEntry>();
     }
     return _typesMap[outputUnit].putIfAbsent(type, () {
       return new _BoundMetadataEntry(_computeTypeRepresentation(type,