Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler"

pkg/compiler/lib/src/native/native.dart

Index: pkg/compiler/lib/src/native/native.dart
diff --git a/pkg/compiler/lib/src/native/native.dart b/pkg/compiler/lib/src/native/native.dart
deleted file mode 100644
index 9033735f50874d7f09b9196ea674af37fff8aee3..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/native/native.dart
+++ /dev/null
@@ -1,62 +0,0 @@
-// 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 native;
-
-import 'dart:collection' show Queue;
-
-import '../constants/values.dart';
-import '../dart2jslib.dart';
-import '../dart_types.dart';
-import '../elements/elements.dart';
-import '../elements/modelx.dart' show ClassElementX, FunctionElementX;
-import '../js/js.dart' as js;
-import '../js_backend/js_backend.dart';
-import '../js_emitter/js_emitter.dart' show CodeEmitterTask;
-import '../resolution/resolution.dart' show ResolverVisitor;
-import '../scanner/scannerlib.dart';
-import '../ssa/ssa.dart';
-import '../tree/tree.dart';
-import '../universe/universe.dart' show SideEffects;
-import '../util/util.dart';
-
-part 'behavior.dart';
-part 'enqueue.dart';
-part 'js.dart';
-part 'scanner.dart';
-part 'ssa.dart';
-
-void maybeEnableNative(Compiler compiler,
-                       LibraryElement library) {
-  String libraryName = library.canonicalUri.toString();
-  if (library.entryCompilationUnit.script.name.contains(
-          'dart/tests/compiler/dart2js_native')
-      || libraryName == 'dart:async'
-      || libraryName == 'dart:html'
-      || libraryName == 'dart:html_common'
-      || libraryName == 'dart:indexed_db'
-      || libraryName == 'dart:js'
-      || libraryName == 'dart:svg'
-      || libraryName == 'dart:_native_typed_data'
-      || libraryName == 'dart:web_audio'
-      || libraryName == 'dart:web_gl'
-      || libraryName == 'dart:web_sql') {
-    library.canUseNative = true;
-  }
-}
-
-// The tags string contains comma-separated 'words' which are either dispatch
-// tags (having JavaScript identifier syntax) and directives that begin with
-// `!`.
-List<String> nativeTagsOfClassRaw(ClassElement cls) {
-  String quotedName = cls.nativeTagInfo;
-  return quotedName.substring(1, quotedName.length - 1).split(',');
-}
-
-List<String> nativeTagsOfClass(ClassElement cls) {
-  return nativeTagsOfClassRaw(cls).where((s) => !s.startsWith('!')).toList();
-}
-
-bool nativeTagsForcedNonLeaf(ClassElement cls) =>
-    nativeTagsOfClassRaw(cls).contains('!nonleaf');