Support named arguments for dynamic calls.

frog/leg/namer.dart

Index: frog/leg/namer.dart
===================================================================
--- frog/leg/namer.dart	(revision 3781)
+++ frog/leg/namer.dart	(working copy)
@@ -32,9 +32,9 @@
   final String ISOLATE = "Isolate";
 
 
-  String closureInvocationName(int arity) {
+  String closureInvocationName(Selector selector) {
     // TODO(floitsch): mangle, while not conflicting with instance names.
-    return instanceMethodName(CLOSURE_INVOCATION_NAME, arity);
+    return instanceMethodInvocationName(CLOSURE_INVOCATION_NAME, selector);
   }
 
   String instanceMethodName(SourceString name, int arity) {
@@ -42,6 +42,11 @@
     return '$name\$$arity';
   }
 
+  String instanceMethodInvocationName(SourceString name, Selector selector) {
+    // TODO(floitsch): mangle, while preserving uniqueness.
+    return '$name\$$selector';
+  }
+
   String instanceFieldName(SourceString name) {
     return '$name';
   }