Move scanner out of generated and clean up imports

pkg/analysis_server/lib/src/services/correction/statement_analyzer.dart

 // Copyright (c) 2014, 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 services.src.correction.statement_analyzer;
 
 import 'package:analysis_server/src/protocol_server.dart';
 import 'package:analysis_server/src/services/correction/selection_analyzer.dart';
 import 'package:analysis_server/src/services/correction/source_range.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/correction/util.dart';
+import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/src/dart/scanner/reader.dart';
+import 'package:analyzer/src/dart/scanner/scanner.dart';
 import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * Returns [Token]s of the given Dart source, not `null`, may be empty if no
  * tokens or some exception happens.
  */
 List<Token> _getTokens(String text) {
   try {
     List<Token> tokens = <Token>[];
     Scanner scanner = new Scanner(null, new CharSequenceReader(text), null);
@@ skipping 194 matching lines @@
    */
   static bool _containsAny(List<AstNode> nodes, List<AstNode> otherNodes) {
     for (AstNode otherNode in otherNodes) {
       if (nodes.contains(otherNode)) {
         return true;
       }
     }
     return false;
   }
 }