Use ExperimentStatus.currentVersion in MockSdk.

Change-Id: I9750278b58656d9049f689d4e1ea9b9c1f00f863
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170025
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
diff --git a/pkg/analyzer/lib/src/test_utilities/mock_sdk.dart b/pkg/analyzer/lib/src/test_utilities/mock_sdk.dart
index 440043d..9772a68 100644
--- a/pkg/analyzer/lib/src/test_utilities/mock_sdk.dart
+++ b/pkg/analyzer/lib/src/test_utilities/mock_sdk.dart
@@ -6,6 +6,7 @@
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/dart/analysis/experiments.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
@@ -1103,7 +1104,10 @@
     _versionFile = resourceProvider
         .getFolder(resourceProvider.convertPath(sdkRoot))
         .getChildAssumingFile('version');
-    _versionFile.writeAsStringSync('2.12.0');
+    _versionFile.writeAsStringSync(
+      '${ExperimentStatus.currentVersion.major}.'
+      '${ExperimentStatus.currentVersion.minor}.0',
+    );
 
     for (MockSdkLibrary library in _LIBRARIES) {
       var convertedLibrary = library._toProvider(resourceProvider);