Add support for generating lints when using the new driver

pkg/analyzer/lib/src/dart/analysis/status.dart

 // Copyright (c) 2016, 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';
 
 /**
  * The status of analysis.
  */
 class AnalysisStatus {
@@ skipping 52 matching lines @@
    * The controller for the [stream].
    */
   final _statusController = new StreamController<AnalysisStatus>();
 
   /**
    * The last status sent to the [stream].
    */
   AnalysisStatus _currentStatus = AnalysisStatus.IDLE;
 
   /**
+   * Return the last status sent to the [stream].
+   */
+  AnalysisStatus get currentStatus => _currentStatus;
+
+  /**
    * Return the stream that produces [AnalysisStatus] events.
    */
   Stream<AnalysisStatus> get stream => _statusController.stream;
 
   /**
    * Send a notifications to the [stream] that the driver started analyzing.
    */
   void transitionToAnalyzing() {
     if (_currentStatus != AnalysisStatus.ANALYZING) {
       _currentStatus = AnalysisStatus.ANALYZING;
       _statusController.add(AnalysisStatus.ANALYZING);
     }
   }
 
   /**
    * Send a notifications to the [stream] stream that the driver is idle.
    */
   void transitionToIdle() {
     if (_currentStatus != AnalysisStatus.IDLE) {
       _currentStatus = AnalysisStatus.IDLE;
       _statusController.add(AnalysisStatus.IDLE);
     }
   }
 }