Add a flag for caching all analysis results in the driver.

pkg/analyzer/test/src/dart/analysis/base.dart

 // Copyright (c) 2016, 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.
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
@@ skipping 45 matching lines @@
   AnalysisDriverScheduler scheduler;
   AnalysisDriver driver;
   final List<AnalysisStatus> allStatuses = <AnalysisStatus>[];
   final List<AnalysisResult> allResults = <AnalysisResult>[];
   final List<ExceptionResult> allExceptions = <ExceptionResult>[];
 
   String testProject;
   String testFile;
   String testCode;
 
+  bool get disableChangesAndCacheAllResults => false;
+
   void addTestFile(String content, {bool priority: false}) {
     testCode = content;
     provider.newFile(testFile, content);
     driver.addFile(testFile);
     if (priority) {
       driver.priorityFiles = [testFile];
     }
   }
 
   int findOffset(String search) {
@@ skipping 41 matching lines @@
         new SourceFactory([
           new DartUriResolver(sdk),
           generatedUriResolver,
           new PackageMapUriResolver(provider, <String, List<Folder>>{
             'test': [provider.getFolder(testProject)]
           }),
           new ResourceUriResolver(provider)
         ], null, provider),
         new AnalysisOptionsImpl()
           ..strongMode = true
-          ..enableUriInPartOf = true);
+          ..enableUriInPartOf = true,
+        disableChangesAndCacheAllResults: disableChangesAndCacheAllResults);
     scheduler.start();
     scheduler.status.listen(allStatuses.add);
     driver.results.listen(allResults.add);
     driver.exceptions.listen(allExceptions.add);
   }
 
   String _p(String path) => provider.convertPath(path);
 }
 
 /**
  * Wraps an [_ElementVisitorFunction] into a [GeneralizingElementVisitor].
  */
 class _ElementVisitorFunctionWrapper extends GeneralizingElementVisitor {
   final _ElementVisitorFunction function;
 
   _ElementVisitorFunctionWrapper(this.function);
 
   visitElement(Element element) {
     function(element);
     super.visitElement(element);
   }
 }
 
 class _GeneratedUriResolverMock extends TypedMock implements UriResolver {}