Extract CallStructure from Selector.

tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart

 // Copyright (c) 2014, 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.
 
 // SExpressionUnstringifier implements the inverse operation to
 // [SExpressionStringifier].
 
 library sexpr_unstringifier;
 
 import 'package:compiler/src/constants/expressions.dart'
     show PrimitiveConstantExpression;
 import 'package:compiler/src/constants/values.dart';
 import 'package:compiler/src/dart2jslib.dart' as dart2js
     show MessageKind;
 import 'package:compiler/src/dart_types.dart' as dart_types
     show DartType;
 import 'package:compiler/src/elements/elements.dart'
    show Entity, Element, Elements, Local, TypeVariableElement, ErroneousElement,
-         TypeDeclarationElement, ExecutableElement;
+         TypeDeclarationElement, ExecutableElement, PublicName;
 import 'package:compiler/src/elements/modelx.dart'
     show ErroneousElementX, TypeVariableElementX;
 import 'package:compiler/src/tree/tree.dart' show LiteralDartString;
 import 'package:compiler/src/universe/universe.dart'
-    show Selector, SelectorKind;
+    show Selector, SelectorKind, CallStructure;
 import 'package:compiler/src/cps_ir/cps_ir_nodes.dart';
 
 /// Used whenever a node constructed by [SExpressionUnstringifier] needs a
 /// named entity.
 class DummyEntity extends Entity {
   final String name;
   DummyEntity(this.name);
 }
 
 /// Used whenever a node constructed by [SExpressionUnstringifier] needs a
@@ skipping 148 matching lines @@
   /// Returns a new named dummy selector with a roughly appropriate kind.
   Selector dummySelector(String name, int argumentCount) {
     SelectorKind kind;
     if (name == "[]") {
       kind = SelectorKind.INDEX;
     } else if (Elements.isOperatorName(name)) {
       kind = SelectorKind.OPERATOR;
     } else {
       kind = SelectorKind.CALL;
     }
-    return new Selector(kind, name, null, argumentCount);
+    return new Selector(kind, new PublicName(name), 
+        new CallStructure.unnamed(argumentCount));
   }
 
   /// Returns the tokens in s. Note that string literals are not necessarily
   /// preserved; for instance, "(literalString)" is transformed to
   /// " ( literalString ) ".
   Tokens tokenize(String s) =>
       new Tokens(
           s.replaceAll("(", " ( ")
            .replaceAll(")", " ) ")
            .replaceAll("{", " { ")
@@ skipping 525 matching lines @@
     return new ReifyTypeVar(type);
   }
 
   /// (This)
   This parseThis() {
     tokens.consumeStart(THIS);
     tokens.consumeEnd();
     return new This();
   }
 }