Stabilize browser smoke profile cleanup

test-web-wasm-browser-smoke.sh

@@ -189,6 +189,16 @@ virtual_time_budget=${BROWSER_SMOKE_VIRTUAL_TIME_BUDGET:-20000}
 server_log=$(mktemp "${TMPDIR:-/tmp}/cnc_sim_browser_smoke_server.XXXXXX.log")
 dom_log=$(mktemp "${TMPDIR:-/tmp}/cnc_sim_browser_smoke_dom.XXXXXX.html")
 profile_dir=$(mktemp -d "${TMPDIR:-/tmp}/cnc_sim_browser_smoke_profile.XXXXXX")
+remove_profile_dir() {
+    local attempt
+    for attempt in {1..20}; do
+        if rm -rf "$profile_dir"; then
+            return 0
+        fi
+        sleep 0.1
+    done
+    rm -rf "$profile_dir" >/dev/null 2>&1 || true
+}
 cleanup() {
     if [[ -n "${chromium_pid:-}" ]]; then
         kill "$chromium_pid" >/dev/null 2>&1 || true
@@ -199,7 +209,7 @@ cleanup() {
         wait "$server_pid" >/dev/null 2>&1 || true
     fi
     rm -f "$server_log" "$dom_log"
-    rm -rf "$profile_dir"
+    remove_profile_dir
 }
 trap cleanup EXIT