Use Element.nameLength where possible.

pkg/analysis_server/lib/src/services/index/index_contributor.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.index.index_contributor;
 
 import 'dart:collection' show Queue;
 
 import 'package:analysis_server/analysis/index_core.dart';
 import 'package:analysis_server/src/services/correction/namespace.dart';
@@ skipping 631 matching lines @@
           return false;
         }
         return target != null;
       }
     }
     return false;
   }
 
   void _recordHasAncestor(ClassElement element) {
     int offset = element.nameOffset;
-    int length = element.name.length;
+    int length = element.nameLength;
     LocationImpl location = _createLocationForOffset(offset, length);
     _recordHasAncestor0(location, element, false, <ClassElement>[]);
   }
 
   void _recordHasAncestor0(LocationImpl location, ClassElement element,
       bool includeThis, List<ClassElement> visitedElements) {
     if (element == null) {
       return;
     }
     if (visitedElements.contains(element)) {
@@ skipping 147 matching lines @@
   }
 
   /**
    * @return `true` if given "node" is part of [PrefixedIdentifier] "prefix.node".
    */
   static bool _isIdentifierInPrefixedIdentifier(SimpleIdentifier node) {
     AstNode parent = node.parent;
     return parent is PrefixedIdentifier && parent.identifier == node;
   }
 }