Deprecate DirectoryBasedDartSdk and transition existing uses to the new API

pkg/analyzer/test/src/context/cache_test.dart

Index: pkg/analyzer/test/src/context/cache_test.dart
diff --git a/pkg/analyzer/test/src/context/cache_test.dart b/pkg/analyzer/test/src/context/cache_test.dart
index dc09c80707c326ac76c60c6e493bffd20c86dbaf..bc8342a2400ce88725f3da4eae68e3e2ba9bcc4c 100644
--- a/pkg/analyzer/test/src/context/cache_test.dart
+++ b/pkg/analyzer/test/src/context/cache_test.dart
@@ -6,11 +6,12 @@ library analyzer.test.src.context.cache_test;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/context/cache.dart';
+import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
-import 'package:analyzer/src/generated/sdk_io.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_collection.dart';
 import 'package:analyzer/src/task/model.dart';
@@ -1177,8 +1178,10 @@ class SdkCachePartitionTest extends CachePartitionTest {
 
   void test_contains_true() {
     SdkCachePartition partition = new SdkCachePartition(null);
-    SourceFactory factory = new SourceFactory(
-        [new DartUriResolver(DirectoryBasedDartSdk.defaultSdk)]);
+    ResourceProvider resourceProvider = PhysicalResourceProvider.INSTANCE;
+    FolderBasedDartSdk sdk = new FolderBasedDartSdk(resourceProvider,
+        FolderBasedDartSdk.defaultSdkDirectory(resourceProvider));
+    SourceFactory factory = new SourceFactory([new DartUriResolver(sdk)]);
     AnalysisTarget target = factory.forUri("dart:core");
     expect(partition.isResponsibleFor(target), isTrue);
   }