Implement "analysis.reanalyze" in analysis server.

pkg/analysis_server/lib/src/analysis_server.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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 456 matching lines @@
       if (!operationQueue.isEmpty) {
         _schedulePerformOperation();
       } else {
         sendStatusNotification(null);
         _notifyAnalysisComplete();
       }
     }
   }
 
   /**
+   * Trigger reanalysis of all files from disk.
+   */
+  void reanalyze() {
+    // Clear any operations that are pending.
+    operationQueue.clear();
+    // Instruct the contextDirectoryManager to rebuild all contexts from
+    // scratch.
+    contextDirectoryManager.refresh();
+  }
+
+  /**
    * Remove the given [listener] from the list of listeners that are listening
    * for lifecycle events from this server.
    */
   void removeAnalysisServerListener(AnalysisServerListener listener) {
     listeners.remove(listener);
   }
 
   /**
    * Send status notification to the client. The `operation` is the operation
    * being performed or `null` if analysis is complete.
@@ skipping 425 matching lines @@
  * An object that is listening for lifecycle events from an analysis server.
  */
 abstract class AnalysisServerListener {
   /**
    * Analysis is complete.
    */
   void analysisComplete();
 }
 
 typedef void OptionUpdater(AnalysisOptionsImpl options);