Add support for cross-session storage

pkg/analyzer/test/file_system/test_all.dart

Index: pkg/analyzer/test/file_system/test_all.dart
diff --git a/pkg/analyzer/test/file_system/test_all.dart b/pkg/analyzer/test/file_system/test_all.dart
index 41307a9b2fa0d56e479daa680b7360e350cc1dff..40cf4aa3f32f0ef42c7b0f0b5c005c9e728a80fb 100644
--- a/pkg/analyzer/test/file_system/test_all.dart
+++ b/pkg/analyzer/test/file_system/test_all.dart
@@ -7,6 +7,7 @@ library test.file_system;
 import 'package:unittest/unittest.dart';
 
 import 'memory_file_system_test.dart' as memory_file_system_test;
+import 'physical_resource_provider_test.dart' as physical_resource_provider_test;
 import 'resource_uri_resolver_test.dart' as resource_uri_resolver_test;
 
 
@@ -15,6 +16,7 @@ main() {
   groupSep = ' | ';
   group('file_system', () {
     memory_file_system_test.main();
+    physical_resource_provider_test.main();
     resource_uri_resolver_test.main();
   });
 }