Use shorter names for some standard properties on closures.

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

Index: pkg/compiler/lib/src/js_backend/namer.dart
diff --git a/pkg/compiler/lib/src/js_backend/namer.dart b/pkg/compiler/lib/src/js_backend/namer.dart
index 3fd530b20f424a31d600186a84efd765fba1cd92..ff9dbcf8d4c6d77969591bd99d54372b5aa921dc 100644
--- a/pkg/compiler/lib/src/js_backend/namer.dart
+++ b/pkg/compiler/lib/src/js_backend/namer.dart
@@ -442,20 +442,22 @@ class Namer {
   final String superPrefix = r'super$';
   final String metadataField = '@';
   final String callPrefix = 'call';
-  final String callCatchAllName = r'call*';
+  // Note: We can't shorten 'call*' in the minified namers because the catch-all
+  // formula `name + "*"` is used by mirrors.
+  String get callCatchAllName => r'call*';
   final String callNameField = r'$callName';
   final String stubNameField = r'$stubName';
   final String reflectableField = r'$reflectable';
   final String reflectionInfoField = r'$reflectionInfo';
   final String reflectionNameField = r'$reflectionName';
   final String metadataIndexField = r'$metadataIndex';
-  final String defaultValuesField = r'$defaultValues';
+  String get requiredParameterField => r'$requiredArgCount';
+  String get defaultValuesField => r'$defaultValues';
   final String methodsWithOptionalArgumentsField =
       r'$methodsWithOptionalArguments';
   final String deferredAction = r'$deferredAction';
 
   final String classDescriptorProperty = r'^';
-  final String requiredParameterField = r'$requiredArgCount';
 
   /// The non-minifying namer's [callPrefix] with a dollar after it.
   static const String _callPrefixDollar = r'call$';