Use an enum in embedded_names as input to JS_GET_NAME.

sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart

 // Copyright (c) 2014, 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.
 
 /// Contains the names of globals that are embedded into the output by the
 /// compiler.
 ///
 /// Variables embedded this way should be access with `JS_EMBEDDED_GLOBAL` from
 /// the `_foreign_helper` library.
 ///
@@ skipping 40 matching lines @@
 /// only contain one Dart isolate.
 const CREATE_NEW_ISOLATE = 'createNewIsolate';
 
 const CLASS_ID_EXTRACTOR = 'classIdExtractor';
 const CLASS_FIELDS_EXTRACTOR = 'classFieldsExtractor';
 const INSTANCE_FROM_CLASS_ID = "instanceFromClassId";
 const INITIALIZE_EMPTY_INSTANCE = "initializeEmptyInstance";
 const TYPEDEF_TYPE_PROPERTY_NAME = r"$typedefType";
 const TYPEDEF_PREDICATE_PROPERTY_NAME = r"$$isTypedef";
 const NATIVE_SUPERCLASS_TAG_NAME = r"$nativeSuperclassTag";
-const ARGUMENT_COUNT_PROPERTY = r"$argumentCount";
-const DEFAULT_VALUES_PROPERTY = r"$defaultValues";
 
 /// Returns the type given the name of a class.
 /// This function is called by the runtime when computing rti.
 const GET_TYPE_FROM_NAME = 'getTypeFromName';
 const TYPE_TO_INTERCEPTOR_MAP = "typeToInterceptorMap";
 
+/// Names that are supported by [JS_GET_NAME].
+// TODO(herhut): Make entries lower case (as in fields) and find a better name.
+enum JsGetName {
+  GETTER_PREFIX,
+  SETTER_PREFIX,
+  CALL_PREFIX,
+  CALL_CATCH_ALL,
+  REFLECTABLE,
+  CLASS_DESCRIPTOR_PROPERTY,
+  REQUIRED_PARAMETER_PROPERTY,
+  DEFAULT_VALUES_PROPERTY,
+  CALL_NAME_PROPERTY
+}
+
+