Add nacl_loader_manifest to mash's catalog.

chrome/app/mash/BUILD.gn

Index: chrome/app/mash/BUILD.gn
diff --git a/chrome/app/mash/BUILD.gn b/chrome/app/mash/BUILD.gn
index 8c7afa6ac748ef63b25de23ba4962788134b8c5c..f6f8e3804bacb45f9e707b747048fd9a059b3627 100644
--- a/chrome/app/mash/BUILD.gn
+++ b/chrome/app/mash/BUILD.gn
@@ -89,6 +89,10 @@ catalog("catalog") {
   if (is_linux && !is_android) {
     embedded_services += [ "//components/font_service:manifest" ]
   }
+
+  if (enable_nacl && is_chromeos) {
+    embedded_services += [ "//components/nacl/loader:nacl_loader_manifest" ]
+  }
 }
 
 catalog_cpp_source("chrome_mash_catalog") {