Revert to using on-disk catalog manifest for views mus tests

ui/views/mus/BUILD.gn

Index: ui/views/mus/BUILD.gn
diff --git a/ui/views/mus/BUILD.gn b/ui/views/mus/BUILD.gn
index 4720a32ef854ca68de5e1e8d667451b8cb68685b..c568ec3320daed0c4169e3a0dcd7e7a22c02a11c 100644
--- a/ui/views/mus/BUILD.gn
+++ b/ui/views/mus/BUILD.gn
@@ -120,7 +120,6 @@ static_library("test_support") {
 
   deps = [
     ":mus",
-    ":views_mus_tests_catalog_source",
     "//base",
     "//base/test:test_support",
     "//mojo/edk/system",
@@ -139,6 +138,7 @@ static_library("test_support") {
   ]
 
   data_deps = [
+    ":views_mus_tests_catalog",
     "//ui/resources:ui_test_pak_data",
   ]
 }
@@ -191,6 +191,7 @@ test("views_mus_unittests") {
   ]
 
   data_deps = [
+    ":views_mus_tests_catalog_copy",
     "//services/ui/ime/test_ime_driver",
     "//services/ui/test_wm",
   ]
@@ -251,6 +252,7 @@ test("views_mus_interactive_ui_tests") {
   ]
 
   data_deps = [
+    ":views_mus_tests_catalog_copy",
     "//services/ui/test_wm",
   ]
 
@@ -291,8 +293,13 @@ catalog("views_mus_tests_catalog") {
   catalog_deps = [ "//mash:catalog" ]
 }
 
-catalog_cpp_source("views_mus_tests_catalog_source") {
+copy("views_mus_tests_catalog_copy") {
   testonly = true
-  catalog = ":views_mus_tests_catalog"
-  output_symbol_name = "kViewsMusTestCatalog"
+  sources = get_target_outputs(":views_mus_tests_catalog")
+  outputs = [
+    "${root_out_dir}/views_mus_tests_catalog.json",
+  ]
+  deps = [
+    ":views_mus_tests_catalog",
+  ]
 }