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

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

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
index 95ed2cce4068451130cb6a670c349c87023a9340..4df07cc2195a160282d479c5285d6326081e7f77 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h
@@ -7,12 +7,12 @@
 
 #include <memory>
 
-#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 
 class ImmersiveContextMus;
 class ImmersiveHandlerFactoryMus;
+class SystemTrayControllerMus;
 
 class ChromeBrowserMainExtraPartsAsh : public ChromeBrowserMainExtraParts {
  public:
@@ -27,6 +27,7 @@ class ChromeBrowserMainExtraPartsAsh : public ChromeBrowserMainExtraParts {
  private:
   std::unique_ptr<ImmersiveHandlerFactoryMus> immersive_handler_factory_;
   std::unique_ptr<ImmersiveContextMus> immersive_context_;
+  std::unique_ptr<SystemTrayControllerMus> system_tray_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsAsh);
 };