Fix navigation test on windows

Change-Id: I4689e92cc32ca24c3204270bf378ec35d707d4bb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/352480
Commit-Queue: Keerti Parthasarathy <keertip@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
diff --git a/pkg/analysis_server/test/analysis/notification_navigation_test.dart b/pkg/analysis_server/test/analysis/notification_navigation_test.dart
index 2584fc4..f973034 100644
--- a/pkg/analysis_server/test/analysis/notification_navigation_test.dart
+++ b/pkg/analysis_server/test/analysis/notification_navigation_test.dart
@@ -391,7 +391,7 @@
 }
 ''');
 
-    await prepareNavigation(convertPath(augmentFilePath));
+    await prepareNavigation(augmentFilePath);
     assertHasRegion('bar', targetFile: aFile);
     assertHasTarget('bar');
   }
@@ -417,7 +417,7 @@
 }
 ''');
 
-    await prepareNavigation(convertPath(augmentFilePath));
+    await prepareNavigation(augmentFilePath);
     assertHasRegion('bar', targetFile: aFile);
     assertHasFileTarget(augmentFilePath, 86, 3);
   }