dart2js: Take named arguments into account (again) when naming one-shot interceptors.

pkg/compiler/lib/src/js_backend/minify_namer.dart

Index: pkg/compiler/lib/src/js_backend/minify_namer.dart
diff --git a/pkg/compiler/lib/src/js_backend/minify_namer.dart b/pkg/compiler/lib/src/js_backend/minify_namer.dart
index dd01a92fb34f531e188637576f64ecabe856a1ab..3e9ae73ba3252a544b17c774eeb92f4afd170eb5 100644
--- a/pkg/compiler/lib/src/js_backend/minify_namer.dart
+++ b/pkg/compiler/lib/src/js_backend/minify_namer.dart
@@ -342,9 +342,10 @@ abstract class _MinifiedOneShotInterceptorNamer implements Namer {
     String prefix = selector.isGetter
         ? r"$get"
         : selector.isSetter ? r"$set" : "";
-    String arity = selector.isCall ? "${selector.argumentCount}" : "";
+    String callSuffix =
+        selector.isCall ? callSuffixForStructure(selector.callStructure) : "";
     String suffix = suffixForGetInterceptor(classes);
-    String fullName = "\$intercepted$prefix\$$root$arity\$$suffix";
+    String fullName = "\$intercepted$prefix\$$root$callSuffix\$$suffix";
     return _disambiguateInternalGlobal(fullName);
   }
 }