mash: Fix system tray clock 12/24 hour time setting

ash/mus/window_manager_application.cc

Index: ash/mus/window_manager_application.cc
diff --git a/ash/mus/window_manager_application.cc b/ash/mus/window_manager_application.cc
index f55521a3a10bde17d55141b2c6478528e36c600f..8b212d6cf80e05666352ce1d089ad44f20e1c1ff 100644
--- a/ash/mus/window_manager_application.cc
+++ b/ash/mus/window_manager_application.cc
@@ -11,6 +11,7 @@
 #include "ash/mus/accelerators/accelerator_registrar_impl.h"
 #include "ash/mus/native_widget_factory_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 "ash/mus/window_manager.h"
 #include "base/bind.h"
@@ -154,8 +155,9 @@ void WindowManagerApplication::OnStart(const shell::Identity& identity) {
 
 bool WindowManagerApplication::OnConnect(const shell::Identity& remote_identity,
                                          shell::InterfaceRegistry* registry) {
-  registry->AddInterface<ash::mojom::ShelfController>(this);
-  registry->AddInterface<ash::mojom::WallpaperController>(this);
+  registry->AddInterface<mojom::ShelfController>(this);
+  registry->AddInterface<mojom::SystemTray>(this);
+  registry->AddInterface<mojom::WallpaperController>(this);
   registry->AddInterface<ui::mojom::AcceleratorRegistrar>(this);
   if (remote_identity.name() == "mojo:mash_session") {
     connector()->ConnectToInterface(remote_identity, &session_);
@@ -165,19 +167,25 @@ bool WindowManagerApplication::OnConnect(const shell::Identity& remote_identity,
   return true;
 }
 
-void WindowManagerApplication::Create(
-    const shell::Identity& remote_identity,
-    ash::mojom::ShelfControllerRequest request) {
-  ash::mojom::ShelfController* shelf_controller =
+void WindowManagerApplication::Create(const shell::Identity& remote_identity,
+                                      mojom::ShelfControllerRequest request) {
+  mojom::ShelfController* shelf_controller =
       static_cast<ShelfDelegateMus*>(WmShell::Get()->shelf_delegate());
   DCHECK(shelf_controller);
   shelf_controller_bindings_.AddBinding(shelf_controller, std::move(request));
 }
 
+void WindowManagerApplication::Create(const shell::Identity& remote_identity,
+                                      mojom::SystemTrayRequest request) {
+  mojom::SystemTray* system_tray = SystemTrayDelegateMus::Get();
+  DCHECK(system_tray);
+  system_tray_bindings_.AddBinding(system_tray, std::move(request));
+}
+
 void WindowManagerApplication::Create(
     const ::shell::Identity& remote_identity,
-    ash::mojom::WallpaperControllerRequest request) {
-  ash::mojom::WallpaperController* wallpaper_controller =
+    mojom::WallpaperControllerRequest request) {
+  mojom::WallpaperController* wallpaper_controller =
       static_cast<WallpaperDelegateMus*>(WmShell::Get()->wallpaper_delegate());
   DCHECK(wallpaper_controller);
   wallpaper_controller_bindings_.AddBinding(wallpaper_controller,