Clean up imports in analysis_server and analyzer_cli (and one missed in analyzer)

pkg/analysis_server/lib/src/status/element_writer.dart

 // Copyright (c) 2015, 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 analysis_server.src.status.element_writer;
 
 import 'dart:collection';
 import 'dart:convert';
 
 import 'package:analysis_server/src/status/get_handler.dart';
 import 'package:analysis_server/src/status/tree_writer.dart';
-import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/dart/element/visitor.dart';
+import 'package:analyzer/src/dart/element/element.dart';
 
 /**
  * A visitor that will produce an HTML representation of an element structure.
  */
 class ElementWriter extends GeneralizingElementVisitor with TreeWriter {
   /**
    * Initialize a newly created element writer to write the HTML representation
    * of visited elements on the given [buffer].
    */
   ElementWriter(StringBuffer buffer) {
@@ skipping 145 matching lines @@
       if (name != null) {
         buffer.write('  [');
         buffer.write(GetHandler.makeLink(
             GetHandler.INDEX_ELEMENT_BY_NAME, {'name': name}, 'search index'));
         buffer.write(']');
       }
     }
     buffer.write('<br>');
   }
 }