Send error notifications only for files in analysis roots (and not excluded).

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 1846 matching lines @@
   ServerContextManagerCallbacks(this.analysisServer, this.resourceProvider);
 
   @override
   nd.AnalysisDriver addAnalysisDriver(Folder folder, AnalysisOptions options) {
     ContextBuilder builder = createContextBuilder(folder, options);
     nd.AnalysisDriver analysisDriver = builder.buildDriver(folder.path);
     analysisDriver.results.listen((result) {
       NotificationManager notificationManager =
           analysisServer.notificationManager;
       String path = result.path;
-      if (notificationManager != null) {
-        notificationManager.recordAnalysisErrors(
-            NotificationManager.serverId,
-            path,
-            server.doAnalysisError_listFromEngine(
-                result.driver.analysisOptions, result.lineInfo, result.errors));
-      } else {
-        new_sendErrorNotification(analysisServer, result);
+      if (analysisServer.shouldSendErrorsNotificationFor(path)) {
+        if (notificationManager != null) {
+          notificationManager.recordAnalysisErrors(
+              NotificationManager.serverId,
+              path,
+              server.doAnalysisError_listFromEngine(
+                  result.driver.analysisOptions,
+                  result.lineInfo,
+                  result.errors));
+        } else {
+          new_sendErrorNotification(analysisServer, result);
+        }
       }
       CompilationUnit unit = result.unit;
       if (unit != null) {
         if (notificationManager != null) {
           if (analysisServer._hasAnalysisServiceSubscription(
               AnalysisService.HIGHLIGHTS, path)) {
             _runDelayed(() {
               notificationManager.recordHighlightRegions(
                   NotificationManager.serverId,
                   path,
@@ skipping 370 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');
 }