Bundle some ash resources into chrome for mash=1 use_ash=0

chrome/chrome_paks.gni

Index: chrome/chrome_paks.gni
diff --git a/chrome/chrome_paks.gni b/chrome/chrome_paks.gni
index 8b1ec9ba64e221751d889a8dfe078c29e76d4851..61afb481af55d09fe8289dd02ca25927ddcbfc2c 100644
--- a/chrome/chrome_paks.gni
+++ b/chrome/chrome_paks.gni
@@ -51,7 +51,10 @@ template("chrome_repack_percent") {
       deps += invoker.deps
     }
 
-    if (use_ash) {
+    # Chrome --mash in non-chromeos builds need to access some ash resources
+    # in order to avoid some missing icons in Ash's window manager session.
+    # TODO(tonikitoo): Remove this when a chrome/mus is available.
+    if (use_ash || enable_package_mash_services) {
       sources +=
           [ "$root_gen_dir/ash/resources/ash_resources_${percent}_percent.pak" ]
       deps += [ "//ash/resources" ]