[clang] Record mainfile name in the Frontend time trace (PR #99866)

[Ilya Biryukov via cfe-commits]

================
@@ -81,7 +81,6 @@ std::string GetMetadata(json::Object *Event) {
   if (json::Object *Args = Event->getObject("args")) {
     if (auto Detail = Args->getString("detail"))
       OS << Detail;
-    // Use only filename to not include os-specific path separators.
----------------
ilya-biryukov wrote:

Is this unintentional? Probably warrants a revert.

https://github.com/llvm/llvm-project/pull/99866