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

tests/compiler/dart2js_extra/interceptor_named_arguments_test.dart

Index: tests/compiler/dart2js_extra/interceptor_named_arguments_test.dart
diff --git a/tests/compiler/dart2js_extra/interceptor_named_arguments_test.dart b/tests/compiler/dart2js_extra/interceptor_named_arguments_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..6911a96c4480f3188616b181a856c399e9b65eb8
--- /dev/null
+++ b/tests/compiler/dart2js_extra/interceptor_named_arguments_test.dart
@@ -0,0 +1,56 @@
+// Copyright (c) 2015, 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.
+
+
+// Test that the proper one-shot interceptor is used for different
+// combinations of named arguments.
+import "package:expect/expect.dart";
+
+// Use dart:html to get interceptors into play.
+import "dart:html";
+
+// [createFragment] has the same signature as in [Element].
+class Other {
+  createFragment(html, {validator, treeSanitizer}) {
+    int result = 0;
+    result += validator == null ? 0 : 2;
+    result += treeSanitizer == null ? 0 : 1;
+    return result;
+  }
+}
+
+@NoInline()
+bool wontTell(bool x) => x;
+
+
+// Ensure that we use the interceptor only once per context so that we
+// actually get a one-shot interceptor. This is a little brittle...
+@NoInline()
+testA(thing) {
+  Expect.equals(0, thing.createFragment(null));
+}
+
+@NoInline()
+testB(thing) {
+  Expect.equals(2, thing.createFragment(null, validator: 1));
+}
+
+@NoInline()
+testC(thing) {
+  Expect.equals(1, thing.createFragment(null, treeSanitizer: 1));
+}
+
+@NoInline()
+testD(thing) {
+  Expect.equals(3, thing.createFragment(null, validator: 1, treeSanitizer: 1));
+}
+
+main () {
+  // Ensure we get interceptors into play.
+  var thing = wontTell(true) ? new Other() : new DivElement();
+  testA(thing);
+  testB(thing);
+  testC(thing);
+  testD(thing);
+}