Refactor fuzzy arrow hints.

pkg/analyzer/lib/error/error.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 analyzer.error.error;
 
 import 'dart:collection';
 
 import 'package:analyzer/error/listener.dart';
 import 'package:analyzer/src/dart/scanner/scanner.dart' show ScannerErrorCode;
@@ skipping 280 matching lines @@
   HintCode.UNNECESSARY_NO_SUCH_METHOD,
   HintCode.UNNECESSARY_TYPE_CHECK_FALSE,
   HintCode.UNNECESSARY_TYPE_CHECK_TRUE,
   HintCode.UNUSED_CATCH_CLAUSE,
   HintCode.UNUSED_CATCH_STACK,
   HintCode.UNUSED_ELEMENT,
   HintCode.UNUSED_FIELD,
   HintCode.UNUSED_IMPORT,
   HintCode.UNUSED_LOCAL_VARIABLE,
   HintCode.UNUSED_SHOWN_NAME,
+  HintCode.USES_DYNAMIC_AS_BOTTOM,
   HintCode.USE_OF_VOID_RESULT,
   HintCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD,
   HtmlErrorCode.PARSE_ERROR,
   HtmlWarningCode.INVALID_URI,
   HtmlWarningCode.URI_DOES_NOT_EXIST,
   ParserErrorCode.ABSTRACT_CLASS_MEMBER,
   ParserErrorCode.ABSTRACT_ENUM,
   ParserErrorCode.ABSTRACT_STATIC_METHOD,
   ParserErrorCode.ABSTRACT_TOP_LEVEL_FUNCTION,
   ParserErrorCode.ABSTRACT_TOP_LEVEL_VARIABLE,
@@ skipping 541 matching lines @@
    * a single list of errors.
    */
   static List<AnalysisError> mergeLists(List<List<AnalysisError>> errorLists) {
     Set<AnalysisError> errors = new HashSet<AnalysisError>();
     for (List<AnalysisError> errorList in errorLists) {
       errors.addAll(errorList);
     }
     return errors.toList();
   }
 }