diff -up chromium-122.0.6261.57/build/config/compiler/BUILD.gn.me chromium-122.0.6261.57/build/config/compiler/BUILD.gn
--- chromium-122.0.6261.57/build/config/compiler/BUILD.gn.me	2024-02-23 12:32:11.248584653 +0100
+++ chromium-122.0.6261.57/build/config/compiler/BUILD.gn	2024-02-23 12:45:26.672302958 +0100
@@ -399,6 +399,13 @@ config("compiler") {
       }
     }
 
+    if (is_clang) {
+      cflags += [ "-ftrivial-auto-var-init=zero" ]
+      if (!is_ubsan && !is_ubsan_security) {
+        cflags += [ "-fwrapv" ]
+      }
+    }
+
     # Linker warnings.
     if (fatal_linker_warnings && !is_apple && current_os != "aix" &&
         current_os != "zos") {