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

pkg/analyzer/lib/src/dart/analysis/driver.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.
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:typed_data';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/error/error.dart';
@@ skipping 630 matching lines @@
    */
   AnalysisResult _getCachedAnalysisResult(FileState file, String key) {
     List<int> bytes = _byteStore.get(key);
     if (bytes != null) {
       var unit = new AnalysisDriverResolvedUnit.fromBuffer(bytes);
       List<AnalysisError> errors = unit.errors
           .map((error) => new AnalysisError.forValues(
               file.source,
               error.offset,
               error.length,
-              ErrorCode.byUniqueName(error.uniqueName),
+              errorCodeByUniqueName(error.uniqueName),
               error.message,
               error.correction))
           .toList();
       return new AnalysisResult(file.path, file.uri, null, file.contentHash,
           file.lineInfo, null, errors);
     }
     return null;
   }
 
   /**
@@ skipping 360 matching lines @@
   /**
    * Complete the [signal] future if it is not completed yet. It is safe to
    * call this method multiple times, but the [signal] will complete only once.
    */
   void notify() {
     if (!_completer.isCompleted) {
       _completer.complete(null);
     }
   }
 }