dart2js: add compiler builtins to the core-runtime.

sdk/lib/_internal/compiler/js_lib/js_mirrors.dart

 // Copyright (c) 2013, 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.
 
 library dart._js_mirrors;
 
 import 'dart:_js_embedded_names' show
     JsGetName,
     ALL_CLASSES,
     LAZIES,
@@ skipping 10 matching lines @@
 import 'dart:mirrors';
 
 import 'dart:_foreign_helper' show
     JS,
     JS_GET_FLAG,
     JS_CURRENT_ISOLATE,
     JS_CURRENT_ISOLATE_CONTEXT,
     JS_EMBEDDED_GLOBAL,
     JS_GET_NAME,
     JS_TYPEDEF_TAG,
-    JS_FUNCTION_TYPE_TAG,
     JS_FUNCTION_TYPE_RETURN_TYPE_TAG,
     JS_FUNCTION_TYPE_VOID_RETURN_TAG,
     JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG,
     JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG,
     JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG;
 
 
 import 'dart:_internal' as _symbol_dev;
 
 import 'dart:_js_helper' show
     BoundClosure,
     CachedInvocation,
     Closure,
     JSInvocationMirror,
     JsCache,
     Null,
     Primitives,
     ReflectionInfo,
     RuntimeError,
     TearOffClosure,
     TypeVariable,
     UnimplementedNoSuchMethodError,
     createRuntimeType,
     createUnmangledInvocationMirror,
     getMangledTypeName,
     getMetadata,
     getType,
     getRuntimeType,
+    isDartFunctionType,
     runtimeTypeToString,
     setRuntimeTypeInfo,
     throwInvalidReflectionError,
     TypeImpl,
     deferredLoadHook;
 
 import 'dart:_interceptors' show
     Interceptor,
     JSArray,
     JSExtendableArray,
@@ skipping 2778 matching lines @@
       return typeArgument._mangledName;
     }
     representation =
         runtimeTypeToString(type, onTypeVariable: substituteTypeVariable);
   }
   if (representation != null) {
     return reflectClassByMangledName(
         getMangledTypeName(createRuntimeType(representation)));
   }
   String typedefPropertyName = JS_TYPEDEF_TAG();
-  String functionTagPropertyName = JS_FUNCTION_TYPE_TAG();
   if (type != null && JS('', '#[#]', type, typedefPropertyName) != null) {
     return typeMirrorFromRuntimeTypeRepresentation(
         owner, JS('', '#[#]', type, typedefPropertyName));
-  } else if (type != null &&
-             JS('', '#[#]', type, functionTagPropertyName) != null) {
+  } else if (type != null && isDartFunctionType(type)) {
     return new JsFunctionTypeMirror(type, owner);
   }
   return reflectClass(Function);
 }
 
 Symbol computeQualifiedName(DeclarationMirror owner, Symbol simpleName) {
   if (owner == null) return simpleName;
   String ownerName = n(owner.qualifiedName);
   return s('$ownerName.${n(simpleName)}');
 }
@@ skipping 164 matching lines @@
   // have a part (following a '.') that starts with '_'.
   const int UNDERSCORE = 0x5f;
   if (name.isEmpty) return true;
   int index = -1;
   do {
     if (name.codeUnitAt(index + 1) == UNDERSCORE) return false;
     index = name.indexOf('.', index + 1);
   } while (index >= 0 && index + 1 < name.length);
   return true;
 }