Do not sort named parameters on FunctionNode.

pkg/compiler/lib/src/kernel/kernel_visitor.dart

Index: pkg/compiler/lib/src/kernel/kernel_visitor.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_visitor.dart b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
index d4d621637b0bb8f96f5c272fc51b2d54c4228b9b..7b92d8aae1607d7efd1532a02780abb53ed8f582 100644
--- a/pkg/compiler/lib/src/kernel/kernel_visitor.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
@@ -1997,7 +1997,6 @@ class KernelVisitor extends Object
           positionalParameters.add(variable);
         }
       });
-      namedParameters.sort();
       signature.forEachParameter((ParameterElement parameter) {
         if (!parameter.isOptional) return;
         ir.Expression initializer = visitForValue(parameter.initializer);