Fix warnings introduced in r43163.

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 5891 matching lines @@
   }
   @override
   void set analysisOptions(AnalysisOptions options) {
     fail("Unexpected invocation of setAnalysisOptions");
   }
   @override
   void set analysisPriorityOrder(List<Source> sources) {
     fail("Unexpected invocation of setAnalysisPriorityOrder");
   }
   @override
+  set contentCache(ContentCache value) {
+    fail("Unexpected invocation of setContentCache");
+  }
+  @override
   DeclaredVariables get declaredVariables {
     fail("Unexpected invocation of getDeclaredVariables");
     return null;
   }
   @override
   List<Source> get htmlSources {
     fail("Unexpected invocation of getHtmlSources");
     return null;
   }
   @override
@@ skipping 1160 matching lines @@
   bool contains(Source source) => source == libB;
 }
 
 
 class _UniversalCachePartitionTest_test_setMaxCacheSize implements
     CacheRetentionPolicy {
   @override
   RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry) =>
       RetentionPriority.LOW;
 }