Support map and list literals in analyzer2dart.

sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart

Index: sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
diff --git a/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart b/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
index 5cf7f0459563b5753420aec785d7b92dcff4c882..a79927f820200c85d3755e25afe1ddbbf738e3e9 100644
--- a/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
+++ b/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
@@ -481,7 +481,7 @@ class LiteralList extends Primitive {
   final GenericType type;
   final List<Reference> values;
 
-  LiteralList(this.type, List<Primitive> values)
+  LiteralList(this.type, Iterable<Primitive> values)
       : this.values = _referenceList(values);
 
   accept(Visitor visitor) => visitor.visitLiteralList(this);
@@ -492,7 +492,7 @@ class LiteralMap extends Primitive {
   final List<Reference> keys;
   final List<Reference> values;
 
-  LiteralMap(this.type, List<Primitive> keys, List<Primitive> values)
+  LiteralMap(this.type, Iterable<Primitive> keys, Iterable<Primitive> values)
       : this.keys = _referenceList(keys),
         this.values = _referenceList(values);
 
@@ -566,7 +566,7 @@ class FunctionDefinition extends Node implements InteriorNode {
   bool get isAbstract => body == null;
 }
 
-List<Reference> _referenceList(List<Definition> definitions) {
+List<Reference> _referenceList(Iterable<Definition> definitions) {
   return definitions.map((e) => new Reference(e)).toList();
 }