Fix the build - add the new field.

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.
 
 library analyzer.test.generated.engine_test;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/source/embedder.dart';
 import 'package:analyzer/src/context/cache.dart';
+import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/string_source.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:html/dom.dart' show Document;
@@ skipping 163 matching lines @@
     actualEvents.add(event);
   }
 }
 
 /**
  * Instances of the class `TestAnalysisContext` implement an analysis context in which every
  * method will cause a test to fail when invoked.
  */
 class TestAnalysisContext implements InternalAnalysisContext {
   @override
+  ResultProvider resultProvider;
+
+  @override
   AnalysisCache get analysisCache {
     fail("Unexpected invocation of analysisCache");
     return null;
   }
 
   @override
   AnalysisOptions get analysisOptions {
     fail("Unexpected invocation of getAnalysisOptions");
     return null;
   }
@@ skipping 468 matching lines @@
   bool validateCacheConsistency() {
     fail("Unexpected invocation of validateCacheConsistency");
     return false;
   }
 
   @override
   void visitContentCache(ContentCacheVisitor visitor) {
     fail("Unexpected invocation of visitContentCache");
   }
 }