Move IS_INDEXABLE_FIELD to JsGetName.

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

Index: sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart
diff --git a/sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart b/sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart
index 9118548e3b13f67489ee2fa85e34144ac1b22fc6..734ddb95db7808e5f54e4ca175de557ede530502 100644
--- a/sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart
+++ b/sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart
@@ -93,14 +93,30 @@ enum JsGetName {
   DEFAULT_VALUES_PROPERTY,
   CALL_NAME_PROPERTY,
   DEFERRED_ACTION_PROPERTY,
+  /// Prefix used for generated type argument substitutions on classes.
   OPERATOR_AS_PREFIX,
+  /// Name used for generated function types on classes and methods.
   SIGNATURE_NAME,
+  /// Name used to tag typedefs.
   TYPEDEF_TAG,
+  /// Name used to tag void return in function type representations in
+  /// JavaScript.
   FUNCTION_TYPE_VOID_RETURN_TAG,
+  /// Name used to tag return types in function type representations in
+  /// JavaScript.
   FUNCTION_TYPE_RETURN_TYPE_TAG,
+  /// Name used to tag required parameters in function type representations
+  /// in JavaScript.
   FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG,
+  /// Name used to tag optional parameters in function type representations
+  /// in JavaScript.
   FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG,
+  /// Name used to tag named parameters in function type representations in
+  /// JavaScript.
   FUNCTION_TYPE_NAMED_PARAMETERS_TAG,
+  /// Field name used for determining if an object or its interceptor has
+  /// JavaScript indexing behavior.
+  IS_INDEXABLE_FIELD_NAME,
 }
 
 enum JsBuiltin {