--- qt-everywhere-src-6.9.3.old/qtwebengine/src/3rdparty/chromium/sandbox/policy/linux/sandbox_linux.cc
+++ qt-everywhere-src-6.9.3/qtwebengine/src/3rdparty/chromium/sandbox/policy/linux/sandbox_linux.cc
@@ -708,7 +697,9 @@
     landlock_state = LandlockState::kEnabled;
   }
 
+#if !BUILDFLAG(IS_QTWEBENGINE) // clang-21
   UMA_HISTOGRAM_ENUMERATION("Security.Sandbox.LandlockState", landlock_state);
+#endif
 }
 
 }  // namespace policy
--- qt-everywhere-src-6.9.3.old/qtwebengine/src/3rdparty/chromium/content/browser/webid/federated_auth_request_impl.cc
+++ qt-everywhere-src-6.9.3/qtwebengine/src/3rdparty/chromium/content/browser/webid/federated_auth_request_impl.cc
@@ -2467,7 +2467,9 @@
   // dialog?
   dialog_type_ = dialog_type;
   config_url_ = idp_config_url;
+#if !BUILDFLAG(IS_QTWEBENGINE) // clang-21
   UMA_HISTOGRAM_ENUMERATION("Blink.FedCm.Popup.DialogType", dialog_type_);
+#endif
 
   WebContents* web_contents = request_dialog_controller_->ShowModalDialog(
       url_to_show, rp_mode_,