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

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
index 382007e2c1afa11ce32de04e5c828457e962da67..73f6e2ca8ad566361f8bfa7c081ee5575ac7bb20 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
@@ -23,6 +23,7 @@
 #include "ui/keyboard/keyboard_controller.h"
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/ui/ash/system_tray_controller_mus.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension_factory.h"
 #endif
@@ -38,6 +39,10 @@ void ChromeBrowserMainExtraPartsAsh::PreProfileInit() {
   if (chrome::IsRunningInMash()) {
     immersive_context_ = base::MakeUnique<ImmersiveContextMus>();
     immersive_handler_factory_ = base::MakeUnique<ImmersiveHandlerFactoryMus>();
+#if defined(OS_CHROMEOS)
+    // Must be available at login screen, so initialize before profile.
+    system_tray_controller_ = base::MakeUnique<SystemTrayControllerMus>();
+#endif
   }
 
 #if defined(OS_CHROMEOS)
@@ -68,5 +73,8 @@ void ChromeBrowserMainExtraPartsAsh::PostProfileInit() {
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostMainMessageLoopRun() {
+#if defined(OS_CHROMEOS)
+  system_tray_controller_.reset();
+#endif
   chrome::CloseAsh();
 }