dart2js: remove JS_OBJECT_CLASS_NAME and JS_NULL_CLASS_NAME from foreign

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 0e455624f741db792198eb0864d112a6370574cf..83cc9c26e56322565ec19066e04d91ee72a6fb30 100644
--- a/sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart
+++ b/sdk/lib/_internal/compiler/js_lib/shared/embedded_names.dart
@@ -121,12 +121,6 @@ enum JsBuiltin {
   ///     JS_BUILTIN('bool', JsBuiltin.isFunctionType, o)
   isFunctionType,
 
-  /// Returns true if the given type is the `Function` type literal.
-  ///
-  ///     JS_BUILTIN('returns:bool;effects:none;depends:none',
-  ///                JsBuiltin.isFunctionTypeLiteral, type);
-  isFunctionTypeLiteral,
-
   /// Returns a new function type object.
   ///
   ///     JS_BUILTIN('=Object', JsBuiltin.createFunctionType)
@@ -154,6 +148,26 @@ enum JsBuiltin {
   ///                JsBuiltin.isSubtype, other, type);
   isSubtype,
 
+  /// Returns true if the given type is _the_ `Function` type.
+  /// That is, it returns true if the given [type] is exactly the `Function`
+  /// type rti-encoding.
+  ///
+  ///     JS_BUILTIN('returns:bool;effects:none;depends:none',
+  ///                JsBuiltin.isFunctionTypeLiteral, type);
+  isFunctionTypeRti,
+
+  /// Returns whether the given type is _the_ null-type..
+  ///
+  ///     JS_BUILTIN('returns:bool;effects:none;depends:none',
+  ///                JsBuiltin.isNullType, type);
+  isNullTypeRti,
+
+  /// Returns whether the given type is _the_ Dart Object type.
+  ///
+  ///     JS_BUILTIN('returns:bool;effects:none;depends:none',
+  ///                JsBuiltin.isDartObjectType, type);
+  isDartObjectTypeRti,
+
   /// Returns the metadata of the given [index].
   ///
   ///     JS_BUILTIN('returns:var;effects:none;depends:none',