Revert "Tweak public APIs and use them in patch_sdk, dart2js, and kernel-service."

pkg/front_end/lib/src/fasta/parser/native_support.dart

Index: pkg/front_end/lib/src/fasta/parser/native_support.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/native_support.dart b/pkg/front_end/lib/src/fasta/parser/native_support.dart
deleted file mode 100644
index 2959f7140fd65978bbe7e4a053513110237ec73b..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/fasta/parser/native_support.dart
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright (c) 2017, 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.
-
-/// Implements support for two variants of the native syntax extension.
-///
-///   * The Dart VM variant, where native method bodies have this form:
-///
-///     methodDeclaration() native STRING;
-///
-///   * The Dart2js and DDC variant, where native method bodies have this form:
-///
-///     methodDeclaration() native;
-///
-/// This support is kept separate from parser.dart as this isn't specified in
-/// the Dart Language Specification, also we hope to remove this syntax long
-/// term and replace it with annotations and external declarations.
-library fasta.parser.dart_vm_native;
-
-import '../../scanner/token.dart' show Token;
-
-import '../scanner/token_constants.dart' show STRING_TOKEN;
-
-import '../util/link.dart' show Link;
-
-import 'parser.dart' show optional;
-
-import '../quote.dart' show unescapeString;
-
-/// When parsing a library file, we may encounter a native clause
-/// instead of a function body. This method skips such a clause. The
-/// [expectString] argument is used to choose which variant of the native clause
-/// we expect to parse.
-///
-/// This method is designed to be called when encountering
-/// [ErrorKind.ExpectedBlockToSkip] in [Listener.handleUnrecoverableError].
-Token skipNativeClause(Token token, bool expectString) {
-  if (!optional("native", token)) return null;
-  if (expectString) {
-    token = token.next;
-    if (token.kind != STRING_TOKEN) return null;
-  }
-  if (!optional(";", token.next)) return null;
-  return token;
-}
-
-/// When parsing a library file, we may encounter native getters like
-///
-///     int get length native "List_getLength";
-///
-/// This will result in [identifiers] being
-///
-///     [";", '"List_getLength"', "native", "length", "get"]
-///
-/// Similarly if [expectString] is false, we expect a getter like:
-///
-///     int get length native;
-///
-/// And [identifiers] being
-///
-///     [";", "native", "length", "get"]
-///
-/// This method returns a new list where '"List_getLength"' and "native" are
-/// removed.
-///
-/// This method is designed to be called from [Listener.handleMemberName].
-Link<Token> removeNativeClause(Link<Token> identifiers, bool expectString) {
-  Link<Token> result = identifiers.tail;
-  if (result.isEmpty) return identifiers;
-  if (expectString) {
-    if (result.head.kind != STRING_TOKEN) return identifiers;
-    result = result.tail;
-  }
-  if (result.isEmpty) return identifiers;
-  if (optional('native', result.head)) {
-    return result.tail.prepend(identifiers.head);
-  }
-  return identifiers;
-}
-
-/// When the parser encounters a native clause and expects a string (like in VM
-/// and flutter patch files), this method extracts the native name in that
-/// string.
-String extractNativeMethodName(Token token) {
-  return unescapeString(token.next.lexeme);
-}