Allow injecting OperationPerformanceImpl into linkLibraries2

Bug: b/430976289
Change-Id: I6be91f7500906c9a7cbba32538ef93042a31f4b2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/440222
Reviewed-by: Konstantin Shcheglov <[email protected]>
Commit-Queue: Ivan Inozemtsev <[email protected]>

Author: iinozemtsev

pkg/analyzer/lib/src/dart/micro/resolve_file.dart

@@ -447,10 +447,13 @@ class FileResolver {
   /// partially resynthesized data, and so prepare for loading linked summaries
   /// from bytes, which will be done by [getErrors2]. It is OK for it to
   /// spend some more time on this.
-  Future<void> linkLibraries2({required String path}) async {
+  Future<void> linkLibraries2({
+    required String path,
+    OperationPerformanceImpl? performance,
+  }) async {
     _throwIfNotAbsoluteNormalizedPath(path);
 
-    var performance = OperationPerformanceImpl('<unused>');
+    performance ??= OperationPerformanceImpl('<unused>');
 
     var fileContext = getFileContext(path: path, performance: performance);
     var file = fileContext.file;