Update status pages to show package map and plugins

pkg/analysis_server/lib/src/plugin/plugin_manager.dart

 // Copyright (c) 2017, 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:io' show Platform;
 
 import 'package:analysis_server/src/plugin/notification_manager.dart';
 import 'package:analyzer/context/context_root.dart' as analyzer;
@@ skipping 295 matching lines @@
   PluginManager(this.resourceProvider, this.byteStorePath, this.sdkPath,
       this.notificationManager, this.instrumentationService) {
     // TODO(brianwilkerson) Figure out the right list of plugin paths.
     _whitelistGlobs = <Glob>[
       new Glob(resourceProvider.pathContext.separator,
           '**/analyze_angular/tools/analysis_plugin')
     ];
   }
 
   /**
+   * Return a list of all of the plugins that are currently known.
+   */
+  @visibleForTesting
+  List<PluginInfo> get plugins => _pluginMap.values.toList();
+
+  /**
    * Add the plugin with the given [path] to the list of plugins that should be
    * used when analyzing code for the given [contextRoot]. If the plugin had not
    * yet been started, then it will be started by this method.
    */
   Future<Null> addPluginToContextRoot(
       analyzer.ContextRoot contextRoot, String path) async {
     if (!_isWhitelisted(path)) {
       return;
     }
     PluginInfo plugin = _pluginMap[path];
@@ skipping 552 matching lines @@
    * The completer that will be used to complete the future when the response is
    * received from the plugin.
    */
   final Completer<Response> completer;
 
   /**
    * Initialize a pending request.
    */
   _PendingRequest(this.method, this.requestTime, this.completer);
 }