mustash: Show networking items in ash system tray

ash/mus/shell_delegate_mus.cc

Index: ash/mus/shell_delegate_mus.cc
diff --git a/ash/mus/shell_delegate_mus.cc b/ash/mus/shell_delegate_mus.cc
index 8f7bc3bc7ba4df65ac9a8ffb07c882e68ae2cb94..4a6b1047d0c6f307ca95e52fe5a235a14460d651 100644
--- a/ash/mus/shell_delegate_mus.cc
+++ b/ash/mus/shell_delegate_mus.cc
@@ -15,7 +15,6 @@
 #include "ash/mus/context_menu_mus.h"
 #include "ash/mus/new_window_delegate_mus.h"
 #include "ash/mus/shelf_delegate_mus.h"
-#include "ash/mus/system_tray_delegate_mus.h"
 #include "ash/mus/wallpaper_delegate_mus.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
@@ -24,6 +23,12 @@
 #include "ui/app_list/presenter/app_list_presenter.h"
 #include "ui/gfx/image/image.h"
 
+#if defined(OS_CHROMEOS)
+#include "ash/mus/system_tray_delegate_mus.h"
+#else
+#include "ash/common/system/tray/default_system_tray_delegate.h"
+#endif
+
 namespace ash {
 namespace {
 
@@ -170,7 +175,13 @@ ShelfDelegate* ShellDelegateMus::CreateShelfDelegate(ShelfModel* model) {
 }
 
 SystemTrayDelegate* ShellDelegateMus::CreateSystemTrayDelegate() {
+#if defined(OS_CHROMEOS)
   return new SystemTrayDelegateMus(connector_);
+#else
+  // Windows and Linux do not support the services required for most system tray
+  // items. Use the same stub delegate as ash_shell_with_content.
+  return new DefaultSystemTrayDelegate();
+#endif
 }
 
 std::unique_ptr<WallpaperDelegate> ShellDelegateMus::CreateWallpaperDelegate() {