Add AnalysisContext.onResultComputed().

pkg/analyzer/test/generated/engine_test.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.engine_test;
 
 import 'dart:async';
@@ skipping 5723 matching lines @@
   bool isClientLibrary(Source librarySource) {
     fail("Unexpected invocation of isClientLibrary");
     return false;
   }
   @override
   bool isServerLibrary(Source librarySource) {
     fail("Unexpected invocation of isServerLibrary");
     return false;
   }
   @override
+  Stream<ComputedResult> onResultComputed(ResultDescriptor descriptor) {
+    fail("Unexpected invocation of onResultComputed");
+    return null;
+  }
+  @override
   CompilationUnit parseCompilationUnit(Source source) {
     fail("Unexpected invocation of parseCompilationUnit");
     return null;
   }
   @override
   ht.HtmlUnit parseHtmlUnit(Source source) {
     fail("Unexpected invocation of parseHtmlUnit");
     return null;
   }
   @override
@@ skipping 852 matching lines @@
   @override
   bool exists() => true;
 }
 
 class _UniversalCachePartitionTest_test_setMaxCacheSize
     implements CacheRetentionPolicy {
   @override
   RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry) =>
       RetentionPriority.LOW;
 }