Add support for watch events and error notifications

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 'dart:core';
 import 'dart:io' as io;
@@ skipping 51 matching lines @@
 import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/src/util/glob.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:plugin/plugin.dart';
+import 'package:watcher/watcher.dart';
 
 typedef void OptionUpdater(AnalysisOptionsImpl options);
 
 /**
  * Enum representing reasons why analysis might be done for a given file.
  */
 class AnalysisDoneReason {
   /**
    * Analysis of the file completed successfully.
    */
@@ skipping 2017 matching lines @@
     }
   }
 
   @override
   void applyFileRemoved(nd.AnalysisDriver driver, String file) {
     driver.removeFile(file);
     sendAnalysisNotificationFlushResults(analysisServer, [file]);
   }
 
   @override
+  void broadcastWatchEvent(WatchEvent event) {
+    analysisServer.pluginManager.broadcastWatchEvent(event);
+  }
+
+  @override
   void computingPackageMap(bool computing) =>
       analysisServer._computingPackageMap(computing);
 
   @override
   ContextBuilder createContextBuilder(Folder folder, AnalysisOptions options) {
     String defaultPackageFilePath = null;
     String defaultPackagesDirectoryPath = null;
     String path = (analysisServer.contextManager as ContextManagerImpl)
         .normalizedPackageRoots[folder.path];
     if (path != null) {
@@ skipping 229 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }