Compute NativeBasicData for KernelWorldBuilder

pkg/compiler/lib/src/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 dart2js.compiler_base;
 
 import 'dart:async' show Future;
 
 import '../compiler_new.dart' as api;
 import 'closure.dart' as closureMapping show ClosureTask;
@@ skipping 1939 matching lines @@
     if (cls == null && required) {
       throw new SpannableAssertionFailure(
           cls,
           "The library '${library.libraryName}' does not "
           "contain required class: '$name'.");
     }
     return cls?.declaration;
   }
 
   @override
+  void forEachClass(LibraryElement library, void f(ClassElement cls)) {
+    library.implementation.forEachLocalMember((member) {
+      if (member.isClass) {
+        f(member);
+      }
+    });
+  }
+
+  @override
   LibraryElement lookupLibrary(Uri uri, {bool required: false}) {
     LibraryElement library = _libraryProvider.lookupLibrary(uri);
     // If the script of the library is synthesized, the library does not exist
     // and we do not try to load the helpers.
     //
     // This could for example happen if dart:async is disabled, then loading it
     // should not try to find the given element.
     if (library != null && library.isSynthesized) {
       return null;
     }
@@ skipping 29 matching lines @@
   ResolutionFunctionType getLocalFunctionType(LocalFunctionElement function) {
     return function.type;
   }
 
   @override
   ResolutionDartType getUnaliasedType(ResolutionDartType type) {
     type.computeUnaliased(_resolution);
     return type.unaliased;
   }
 }