Do not try to build a private copy of a DLL which is already available on every modern linux system.

--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -1789,8 +1790,9 @@
         deps = [ "//third_party/angle:libGLESv2" ]
       }
     }
-    if (!is_chromeos && angle_shared_libvulkan) {
+    source_set("angle_libvulkan_symbols") {}
+    if (false) {
       extract_symbols("angle_libvulkan_symbols") {
         binary = "$root_out_dir/libvulkan.so.1"
 
         if (current_cpu == "x86") {
--- src/third_party/vulkan-loader/src/BUILD.gn.orig	2024-12-08 18:37:20.394677662 +0100
+++ src/third_party/vulkan-loader/src/BUILD.gn	2024-12-18 13:15:54.021404544 +0100
@@ -144,7 +144,18 @@ if (!is_android) {
     }
   }
 
-  target(library_type, "libvulkan") {
+if (!angle_shared_libvulkan) {
+ import("//build/config/linux/pkg_config.gni")
+ pkg_config("system_libvulkan") {
+  packages = [ "vulkan" ]
+ }
+}
+source_set("libvulkan") {
+ if (!angle_shared_libvulkan) {
+  public_configs = [ ":system_libvulkan" ]
+ }
+}
+  target(library_type, "xlibvulkan") {
     sources = [
       "loader/adapters.h",
       "loader/allocation.c",