Extract CallStructure from Selector.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index d67650b2db706c23f43e06c1111c877cd81d49ce..4b2d79c170b5b94a445703d27e1d974a44c67992 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -337,8 +337,7 @@ class OldEmitter implements Emitter {
   }
 
   String getReflectionNameInternal(elementOrSelector, String mangledName) {
-    String name =
-        namer.privateName(elementOrSelector.library, elementOrSelector.name);
+    String name = namer.privateName(elementOrSelector.memberName);
     if (elementOrSelector.isGetter) return name;
     if (elementOrSelector.isSetter) {
       if (!mangledName.startsWith(namer.setterPrefix)) return '$name=';
@@ -365,9 +364,9 @@ class OldEmitter implements Emitter {
       String namedArguments = '';
       bool isConstructor = false;
       if (elementOrSelector is Selector) {
-        Selector selector = elementOrSelector;
-        positionalParameterCount = selector.positionalArgumentCount;
-        namedArguments = namedParametersAsReflectionNames(selector);
+        CallStructure callStructure = elementOrSelector.callStructure;
+        positionalParameterCount = callStructure.positionalArgumentCount;
+        namedArguments = namedParametersAsReflectionNames(callStructure);
       } else {
         FunctionElement function = elementOrSelector;
         if (function.isConstructor) {
@@ -381,12 +380,9 @@ class OldEmitter implements Emitter {
           for (Element e in signature.optionalParameters) {
             names.add(e.name);
           }
-          Selector selector = new Selector.call(
-              function.name,
-              function.library,
-              positionalParameterCount,
-              names);
-          namedArguments = namedParametersAsReflectionNames(selector);
+          CallStructure callStructure =
+              new CallStructure(positionalParameterCount, names);
+          namedArguments = namedParametersAsReflectionNames(callStructure);
         } else {
           // Named parameters are handled differently by mirrors. For unnamed
           // parameters, they are actually required if invoked
@@ -413,9 +409,9 @@ class OldEmitter implements Emitter {
         'Do not know how to reflect on this $element.');
   }
 
-  String namedParametersAsReflectionNames(Selector selector) {
-    if (selector.getOrderedNamedArguments().isEmpty) return '';
-    String names = selector.getOrderedNamedArguments().join(':');
+  String namedParametersAsReflectionNames(CallStructure structure) {
+    if (structure.isUnnamed) return '';
+    String names = structure.getOrderedNamedArguments().join(':');
     return ':$names';
   }