Compute NativeBasicData for KernelWorldBuilder

pkg/compiler/lib/src/js_backend/native_data.dart

 // Copyright (c) 2016, 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 js_backend.native_data;
 
 import '../common.dart';
 import '../common_elements.dart' show ElementEnvironment;
 import '../elements/entities.dart';
 import '../native/behavior.dart' show NativeBehavior;
@@ skipping 138 matching lines @@
   Set<LibraryEntity> jsInteropLibraries = new Set<LibraryEntity>();
 
   /// The JavaScript classes implemented via typed JavaScript interop.
   Set<ClassEntity> jsInteropClasses = new Set<ClassEntity>();
 
   /// Sets the native tag info for [cls].
   ///
   /// The tag info string contains comma-separated 'words' which are either
   /// dispatch tags (having JavaScript identifier syntax) and directives that
   /// begin with `!`.
-  void setNativeClassTagInfo(ClassEntity cls, String tagInfo) {
-    String tagText = tagInfo.substring(1, tagInfo.length - 1);
+  void setNativeClassTagInfo(ClassEntity cls, String tagText) {
     // TODO(johnniwinther): Assert that this is only called once. The memory
     // compiler copies pre-processed elements into a new compiler through
     // [Compiler.onLibraryScanned] and thereby causes multiple calls to this
     // method.
     assert(invariant(
         cls,
         nativeClassTagInfo[cls] == null ||
             nativeClassTagInfo[cls].text == tagText,
         message: "Native tag info set inconsistently on $cls: "
             "Existing tag info '${nativeClassTagInfo[cls]}', "
@@ skipping 363 matching lines @@
   int get hashCode => Hashing.listHash(names, isNonLeaf.hashCode);
 
   bool operator ==(other) {
     if (identical(this, other)) return true;
     if (other is! NativeClassTag) return false;
     return equalElements(names, other.names) && isNonLeaf == other.isNonLeaf;
   }
 
   String toString() => text;
 }