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

pkg/analyzer/test/generated/inheritance_manager_test.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.inheritance_manager_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 1268 matching lines @@
     classC.methods = <MethodElement>[methodMinC];
     List<ExecutableElement> overrides =
         _inheritanceManager.lookupOverrides(classC, methodName);
     expect(overrides, unorderedEquals([methodMinA, methodMinB]));
     _assertNoErrors(classA);
     _assertNoErrors(classB);
     _assertNoErrors(classC);
   }
 
   void _assertErrors(ClassElement classElt,
-      [List<ErrorCode> expectedErrorCodes = ErrorCode.EMPTY_LIST]) {
+      [List<ErrorCode> expectedErrorCodes = const <ErrorCode>[]]) {
     GatheringErrorListener errorListener = new GatheringErrorListener();
     HashSet<AnalysisError> actualErrors =
         _inheritanceManager.getErrors(classElt);
     if (actualErrors != null) {
       for (AnalysisError error in actualErrors) {
         errorListener.onError(error);
       }
     }
     errorListener.assertErrorsWithCodes(expectedErrorCodes);
   }
@@ skipping 14 matching lines @@
     Source source = new FileSource(resourceProvider.getFile("/test.dart"));
     CompilationUnitElementImpl definingCompilationUnit =
         new CompilationUnitElementImpl("test.dart");
     definingCompilationUnit.librarySource =
         definingCompilationUnit.source = source;
     _definingLibrary = ElementFactory.library(context, "test");
     _definingLibrary.definingCompilationUnit = definingCompilationUnit;
     return new InheritanceManager(_definingLibrary);
   }
 }