Fix spacing issues on Ash shelf

ash/common/test/test_system_tray_delegate.cc

Index: ash/common/test/test_system_tray_delegate.cc
diff --git a/ash/common/test/test_system_tray_delegate.cc b/ash/common/test/test_system_tray_delegate.cc
index 8ce4a759060d3964d815facf50d20abc35d6a88e..4d22fd3d12d3d9c489a34af51a732309d8b94636 100644
--- a/ash/common/test/test_system_tray_delegate.cc
+++ b/ash/common/test/test_system_tray_delegate.cc
@@ -26,11 +26,6 @@ TestSystemTrayDelegate::TestSystemTrayDelegate()
 
 TestSystemTrayDelegate::~TestSystemTrayDelegate() {}
 
-// static
-void TestSystemTrayDelegate::SetSystemUpdateRequired(bool required) {
-  g_system_update_required = required;
-}
-
 void TestSystemTrayDelegate::SetLoginStatus(LoginStatus login_status) {
   login_status_ = login_status;
   WmShell::Get()->UpdateAfterLoginStatusChange(login_status);