Move scanner into pkg/front_end/lib/src/scanner.

pkg/analyzer/test/generated/resolver_test_case.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 analyzer.test.generated.resolver_test_case;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 351 matching lines @@
    * that are given and that they have the expected error codes. The order in which the errors were
    * gathered is ignored.
    *
    * @param source the source against which the errors should have been reported
    * @param expectedErrorCodes the error codes of the errors that should have been reported
    * @throws AnalysisException if the reported errors could not be computed
    * @throws AssertionFailedError if a different number of errors have been reported than were
    *           expected
    */
   void assertErrors(Source source,
-      [List<ErrorCode> expectedErrorCodes = ErrorCode.EMPTY_LIST]) {
+      [List<ErrorCode> expectedErrorCodes = const <ErrorCode>[]]) {
     GatheringErrorListener errorListener = new GatheringErrorListener();
     for (AnalysisError error in analysisContext2.computeErrors(source)) {
       expect(error.source, source);
       ErrorCode errorCode = error.errorCode;
       if (!enableUnusedElement &&
           (errorCode == HintCode.UNUSED_ELEMENT ||
               errorCode == HintCode.UNUSED_FIELD)) {
         continue;
       }
       if (!enableUnusedLocalVariable &&
@@ skipping 452 matching lines @@
    * text. Otherwise, [expected] is used directly a [Matcher] to match the type.
    */
   _expectType(DartType type, expected) {
     if (expected is String) {
       expect(type.toString(), expected);
     } else {
       expect(type, expected);
     }
   }
 }