SocketDescriptor should not be used as a boolean

mojo/BUILD.gn

Index: mojo/BUILD.gn
diff --git a/mojo/BUILD.gn b/mojo/BUILD.gn
index 6e2ed4771c1699a1ab7ba71df1af25d6dea7de87..998e658692e0ba44c0959b610a8b17645b6263bc 100644
--- a/mojo/BUILD.gn
+++ b/mojo/BUILD.gn
@@ -82,17 +82,12 @@ group("tests") {
     "//mojo/services/clipboard:clipboard_unittests",
     "//mojo/services/network:apptests",
     "//mojo/services/network:unittests",
+    "//mojo/shell:external_application_unittests",
     "//mojo/shell:mojo_shell_tests",
     "//mojo/tools:message_generator",
     "//services/js:js_services_unittests",
   ]
 
-  if (!is_win) {
-    deps += [
-      "//mojo/shell:external_application_unittests",
-    ]
-  }
-
   if (use_aura) {
     deps += [
       "//mojo/services/public/cpp/view_manager/tests:mojo_view_manager_lib_unittests",