Remove scanBuiltinLibraries.

tests/compiler/dart2js/mock_compiler.dart

 // Copyright (c) 2012, 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 mock_compiler;
 
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'dart:collection';
 
@@ skipping 237 matching lines @@
 import 'dart:_interceptors';
 import 'dart:_isolate_helper';
 ''';
 
 const String DEFAULT_ISOLATE_HELPERLIB = r'''
   var startRootIsolate;
   var _currentIsolate;
   var _callInIsolate;
   class _WorkerBase {}''';
 
+const String DEFAULT_MIRRORS = r'''
+class Comment {}
+class MirrorSystem {}
+class MirrorsUsed {}
+''';
+
 class MockCompiler extends Compiler {
   api.DiagnosticHandler diagnosticHandler;
   List<WarningMessage> warnings;
   List<WarningMessage> errors;
   List<WarningMessage> hints;
   List<WarningMessage> infos;
   List<WarningMessage> crashes;
   /// Expected number of warnings. If `null`, the number of warnings is
   /// not checked.
   final int expectedWarnings;
@@ skipping 36 matching lines @@
 
     clearMessages();
 
     registerSource(Compiler.DART_CORE, coreSource);
     registerSource(PATCH_CORE, PATCH_CORE_SOURCE);
 
     registerSource(Compiler.DART_JS_HELPER, DEFAULT_HELPERLIB);
     registerSource(Compiler.DART_FOREIGN_HELPER, FOREIGN_LIBRARY);
     registerSource(Compiler.DART_INTERCEPTORS, interceptorsSource);
     registerSource(Compiler.DART_ISOLATE_HELPER, DEFAULT_ISOLATE_HELPERLIB);
+    registerSource(Compiler.DART_MIRRORS, DEFAULT_MIRRORS);
   }
 
   /// Initialize the mock compiler with an empty main library.
   Future init([String mainSource = ""]) {
     Uri uri = new Uri(scheme: "mock");
     registerSource(uri, mainSource);
-    return libraryLoader.loadLibrary(uri, null, uri)
+    return libraryLoader.loadLibrary(uri)
         .then((LibraryElement library) {
-      coreLibrary = libraries['${Compiler.DART_CORE}'];
-      jsHelperLibrary = libraries['${Compiler.DART_JS_HELPER}'];
-      foreignLibrary = libraries['${Compiler.DART_FOREIGN_HELPER}'];
-      interceptorsLibrary = libraries['${Compiler.DART_INTERCEPTORS}'];
-      isolateHelperLibrary = libraries['${Compiler.DART_ISOLATE_HELPER}'];
-
-      assertMethod = jsHelperLibrary.find('assertHelper');
-      identicalFunction = coreLibrary.find('identical');
-
       mainApp = library;
-      initializeSpecialClasses();
       // We need to make sure the Object class is resolved. When registering a
       // dynamic invocation the ArgumentTypesRegistry eventually iterates over
       // the interfaces of the Object class which would be 'null' if the class
       // wasn't resolved.
       objectClass.ensureResolved(this);
     });
   }
 
   Future runCompiler(Uri uri) {
     return init().then((_) {
@@ skipping 253 matching lines @@
 
 class MockElement extends FunctionElementX {
   MockElement(Element enclosingElement)
       : super('', ElementKind.FUNCTION, Modifiers.EMPTY,
               enclosingElement, false);
 
   get node => null;
 
   parseNode(_) => null;
 }