Convert data objects eagerly from K to J

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 353 matching lines @@
       nativeMemberName,
       nativeMethodBehavior,
       nativeFieldLoadBehavior,
       nativeFieldStoreBehavior,
       jsInteropLibraryNames,
       anonymousJsInteropClasses,
       jsInteropClassNames,
       jsInteropMemberNames);
 }
 
-class NativeDataImpl implements NativeData {
+class NativeDataImpl implements NativeData, NativeBasicDataImpl {
   /// Prefix used to escape JS names that are not valid Dart names
   /// when using JSInterop.
   static const String _jsInteropEscapePrefix = r'JS$';
 
-  final NativeBasicData _nativeBasicData;
+  final NativeBasicDataImpl _nativeBasicData;
 
   /// The JavaScript names for native JavaScript elements implemented.
   final Map<MemberEntity, String> nativeMemberName;
 
   /// Cache for [NativeBehavior]s for calling native methods.
   final Map<FunctionEntity, NativeBehavior> nativeMethodBehavior;
 
   /// Cache for [NativeBehavior]s for reading from native fields.
   final Map<MemberEntity, NativeBehavior> nativeFieldLoadBehavior;
 
@@ skipping 206 matching lines @@
     return nativeFieldStoreBehavior[field];
   }
 
   /// Apply JS$ escaping scheme to convert possible escaped Dart names into
   /// JS names.
   String computeUnescapedJSInteropName(String name) {
     return name.startsWith(_jsInteropEscapePrefix)
         ? name.substring(_jsInteropEscapePrefix.length)
         : name;
   }
+
+  @override
+  Set<ClassEntity> get jsInteropClasses => _nativeBasicData.jsInteropClasses;
+
+  @override
+  Set<LibraryEntity> get jsInteropLibraries =>
+      _nativeBasicData.jsInteropLibraries;
+
+  @override
+  Map<ClassEntity, NativeClassTag> get nativeClassTagInfo =>
+      _nativeBasicData.nativeClassTagInfo;
+
+  @override
+  ElementEnvironment get _env => _nativeBasicData._env;
 }
 
 class NativeClassTag {
   final List<String> names;
   final bool isNonLeaf;
 
   factory NativeClassTag(String tagText) {
     List<String> tags = tagText.split(',');
     List<String> names = tags.where((s) => !s.startsWith('!')).toList();
     bool isNonLeaf = tags.contains('!nonleaf');
@@ skipping 17 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;
 }